Existence and Predication: the Frege-Russell 'Is' Ambiguity Thesis
INTRODUCTION: THE MEANINGS OF THE WORD "IS"
This page use the font Lucida Sans Unicode for logical symbols.
"One of the most interesting open problems in the history of formal sciences concerns the rise of modern logic epitomized by the Frege-Russell theory of quantifiers. One of the
cornerstones of this theory is the distinction between the allegedly different meanings of verbs for being. According to received wisdom, such verbs are multiply ambiguous between the is of
predication, the is of existence, the is of identity, and the is of subsumption. This view, also known as the Frege-Russell ambiguity thesis, is built into the notations that have been used in logic
since the turn of the 20th century, in that the allegedly different meanings are expressed differently in the usual logical notations. (1) The is of identity is expressed by the identity sign a = b,
the is of predication by a singular term's filling the argument slot of a predicative expression P(a), the is of existence by the existential quantifier (∃x)P(x), and the is of subsumption by a general conditional of the form (Vx) (x ∊ S ⊃ x ∊ P). Both Gottlob Frege and Bertrand Russell attached great
importance to the ambiguity of the verb is. During the 20th century it became commonplace to subscribe to this thesis even though it is not necessary or even fully obvious (cf. [Hintikka 1979];
[Mates 1979]). But then again, it turns out that after the Middle Ages no philosopher assumed such multiple ambiguity before the 19th century. What happened? How did the Frege-Russell thesis come
about? In what follows, I approach these questions from a historical point of view. I first say a few introductory words about the treatment of existence in Aristotle and Kant, and thereafter focus
on the 19th century English developments in the field of the algebra of logic and on the ideas of George Boole and Augustus De Morgan in particular.
Aristotle considered the Frege-Russell distinction but rejected it. His treatment of existence in the context of a syllogistically constructed science was in rough agreement with
the ancient Greek language, in which there were no separate verbs for existence. Existence was expressed by the absolute construction with ἐστιν which looks like a
special case of predication, e.g., "Zeus is" as a limiting case of such statements as "Zeus is a god" or "Zeus is powerful". In effect, Aristotle treated the different Frege-Russell senses of
different components in the force of ἐστιν. Each of these components could be absent or present on any one occasion of the use of ἐστιν. In syllogistic reasoning, existence was sometimes present as part of the force of the predicate term, sometimes absent. The existential force trickled down from the most
general terms of the sense in question along a sequence of syllogistic conclusions. Hence, in any one particular science existential force had to be assured, according to Aristotle, only for the
widest generic term defining the field of that science:
Thus we assume the meaning alike of unity, straight, and triangular; but while as regards unity and magnitude we assume also the fact of their existence, in the case of the
remainder proof is required.
[An. post., A 10, 76a, 34-36]
Existence could not serve alone as a predicate term because it would have been too broad a term, not restricted to any one category and thus not an essence of anything [An.
post., B 7, 92b, 13-15]. In this sense, according to Aristotle, existence was not a predicate. However, it could be a part of the force of a predicate term.
It is often said that Kant's discussion of existence includes a criticism of the idea that existence is a predicate. In fact, it includes a stronger criticism, namely the rejection
of the idea that existence could be even a part of the force of a predicate term. According to Kant, existence adds nothing to a concept of a thing:
'Being' is obviously not a real predicate; that is, it is not a concept of something which could be added to the concept of a thing. [...] The small word 'is' adds no new
predicate. [Kr. d. r. V., B 625]
This does not mean that Kant embraced the Frege-Russell thesis. It means that at the turn of the 19th century the notion of existence became homeless, as far as the logical
representation of different propositions was concerned. It must be admitted, though, that Kant's criticism served to disassociate the predicative and the existential uses of is from one another.
According to Leila Haaparanta, Kant seems to have inspired the Frege-Russell distinction [Haaparanta 1986].
After Kant the next major development in logical theory was the algebra of logic that originated in England around the mid-19th century.(2) The following two ideas came to the
(1) the operators corresponding to the syllogistical standard forms of universal and particular judgments were treated as duals;
(2) universal judgments were taken to be relative to some universe of discourse and were inevitably taken as the non-existence of exceptions in that domain.
Because of the duality, existential quantifier expressions came to express existence. The homeless notion of existence thus found a new home, no longer in the predicative
is but in the existential quantifier.
Before moving on to take a closer look upon the ideas of Augustus De Morgan and George Boole, it is important to acknowledge that neither of them introduced existential or universal
quantifiers, and therefore they must not be regarded as early pioneers of the predicate calculus. However, at least De Morgan seems to have been aware of at least some of the difficulties that arose
in the absence of quantifiers [2, The Boole-De Morgan correspondence: 1842-1864. Edited by Smith George C. Oxford: Clarendon Press 1982.p. 24]." pp. 255-257.
From: Risto Vilkko - Existence, identity, and the algebra of logic. In Foundations of the formal sciences. The history of the concept of the formal sciences. Edited by Löwe
Benedikt, Peckhaus Volker, and Räsch Thomas. London: College Publications 2006. pp. 255-265
(1) Stanislaw Lesniewski's notation provides an important exception here.
(2) Strictly speaking it was upon Leibniz's initiative that the idea of an algebraic structure of logic began to grow -- even though it was Boole who really started its systematic
'BEING' FROM A LINGUISTIC POINT OF VIEW
"Nowadays, logicians tend to draw a sharp distinction between the 'existential' function of 'the verb to be' and, its various 'predicative' or 'copulative', functions. The
philosophical importance of this distinction lies in the fact that most modern philosophers would say that existence cannot be predicated of objects in the same sense as their various attributes, or
properties, but is presupposed in the identification of objects or in any reference to them. (...)
It is worth noting, however, that in English 'the verb to be' is not used as freely in existential sentences as it was in Greek: it is such sentences as God is (where 'the
verb to be' is perfectly normal in Greek) that have mainly interested philosophers. What would generally be described as the 'existential' use of 'the verb to be' in English is not common except with
a locative or temporal complement. Examples of this usage are (i) There are lions in Africa, and (ii) The accident was yesterday. We shall discuss such 'existential' sentences presently.
Among the 'predicative' uses of 'the verb to be' logicians customarily distinguish: (a) the identification of one entity with another (a = b: e.g. That man is
John); (b) class-membership (b ∈ C: e.g. John is a Catholic, 'John is a member of the class of persons characterized as Catholic'); and (c)
class-inclusion (C ⊂ D: Catholics are Christians, 'The members of the class of persons characterized as Catholic are included among the members of the class of
persons characterized as Christians').
Though logically important, the distinction between class-membership and class-inclusion does not appear to be of any syntactic significance in most languages. The distinction
between 'characterizing' and 'sortal' sentences (...) is, however, of considerable importance: cf. Apples are sweet and Apples are fruit, The former tend to have an 'adjectival'
predicate (in languages where one can draw a distinction between 'adjectives' and 'verbs'), and the latter a nominal predicate. The syntactic analysis of sentences with nominal predicates (e.g.
Apples are fruit, John is a soldier, Mary is still a very young girl) is a very complex matter: we shall not go into the question here. We will disregard the differences
between various subtypes of nominal predicates and treat them all like 'adjectival' predicates. For terminological convenience, we will refer to both classes of sentences (whether they are
'characterizing' or 'sortal', and regardless of any other differences) as attributive."
From: John Lyons - Introduction to theoretical linguistics - Cambridge, Cambridge University Press, 1968, pp. 388-389.
THE HISTORY OF THE CONCEPT OF BEING AND THE "IS" AMBIGUITY THESIS
"This history involves more changes and contrasts than one might perhaps expect. For one thing, we twentieth-century philosophers are wont to approach the notion of being by means
of the Frege-Russell ambiguity thesis. As we all know this thesis concerns the notion of being, as codified in verbs for being in languages like the English is, German ist or the
ancient Greek estin. What it asserts is that these verbs are multiply ambiguous. We have to distinguish (according to this thesis) from each other the ises of existence, identity,
predication and subsumption. Indeed we are in fact supposed to have learned to distinguish them from each other in practice, for we have all been taught to use first-order logic as our canonical
notation in logic and logical analysis. It is in order for me to emphasize the word ambiguity here. Every half-way sensitive analyst (or perhaps I should say, every sensible analyst) will grant that
verbs for being like the English is are used in different ways on different occasions. What the Frege-Russell thesis does, is to blame these differences in use on the ambiguity of a single word,
instead of explaining the difference in use away in some other way, for instance by reference to the context of use.
The Frege-Russell ambiguity thesis has played a major role in twentieth-century philosophy. With his usual modesty, Russell (1914, p. 50) called it "the first serious advance in
real logic since the time of the Greeks". One of the many surprises in my brief history of the concept of being is how recent a belief in the Frege-Russell thesis is in the history of philosophy. As
far as I know, it is not found in a clear form before the nineteenth century. Its genesis needs and deserves a closer scrutiny, but apparently different versions of the ambiguity thesis were adopted
independently of each other by different thinkers. Some historians assign the credit (or the blame) for introducing the distinction between the existential is and the predicative is
to Kant. (But see below.) In contrast, the thesis is conspicuous by its absence from such philosophers as Aristotle.
As was indicated, it has been claimed that the Frege-Russell distinction can be traced back to Kant and his thesis that "existence is not a predicate". Meinong's case shows that
this cannot be the full story. For one important thing, even though he adopted a part of the Frege-Russell distinction, at the same time existence was in a sense a predicate according to Meinong.
After all, only existential judgements were for him contingent." pp. 29-31.
From: Jaakko Hintikka - "Meinong in a long perspective," Grazer Philosophische Studien 50: 29-45 (1995).
CHARLES H. KAHN ON "BEING" IN ANCIENT GREEK
"I am not myself a linguistic relativist. I want, in effect, to defend the concept of being against its modern detractors. What I hope to do in this paper is to show that when the
Greek concept of being (as introduced by Parmenides and developed by Plato) is properly understood it represents a valid and indeed inevitable topic for philosophic inquiry. It turns out, in fact, to
be fundamentally the same topic that is pursued in the modern ontological tradition of Frege, the early Wittgenstein, and Quine. And it also turns out to be very different from the questions of
personal existence and the human condition which dominate that other school of modern ontology associated with the name of Heidegger. (2)
In order to meet the challenge of linguistic relativism, we must first give an adequate account of the linguistic functions of the verb 'be,' (eimi in ancient Greek), and
then show that these functions provide the basis for a coherent concept and a clear philosophical question. Let me briefly indicate in advance what I take the solution to be. The concept of being in
Greek philosophy refers to the nature of reality or the structure of the world, in the very general sense of 'the world,' which includes whatever we can know or investigate and whatever we can
describe in true or false statements. The question of being is then: How must the world be structured in order for inquiry, knowledge, science, and true discourse or, for that matter, false discourse
to be possible?
On this view of the concept of being, the key notion is that of truth -- the goal of science and the aim of declarative speech. If the claims of linguistic relativism have seemed
plausible in regard to the concept of being, that is due in part to the fact that they rely upon an inadequate account of the functions of the verb 'be,' an account in which the connections with
truth and falsehood --what I call the 'veridical' uses of the verb are generally overlooked. Once we put the notion of truth at the heart of the Greek concept of being, the internal coherence and
general significance of this concept will become clear. I have argued elsewhere that this concept of being does not rest on an illegitimate confusion, since it brings together three distinct notions
-- existence, predication, and truth -- which belong together in any ontology or in any metaphysical scheme. (3) At the same time it is important to recognize that these three notions are
distinct, and that the distinction between them was not always clearly seen in Greek philosophy, precisely because the same verb eimi, and its participle on, was used to express all
three. Here, as elsewhere, it is important to give the devil his due; if we do not, as the saying goes, he will take more than his share. In defending the concept of being against the charge of
linguistic confusion, it is important to recognize the genuine possibilities for confusion that were latent in the multiple usage of the verb. If we bear in mind the distinctions between existence,
predication, and truth, and recognize that these distinctions were often overlooked because of a single linguistic expression for all three, we will be in a better position to interpret a number of
perplexing passages in Plato, Aristotle, and Parmenides, for we will be in a position to articulate some problems more clearly than the Greek philosophers were able to do. My guess is that the same
may be true for Indian philosophy, for the basic functions of the verb as in Sanskrit seem to be very nearly the same as those of eimi in Greek. If my linguistic analysis of the
verb 'be' is adequate for Greek, it (or a similar analysis) ought to be adequate for Sanskrit. And if the linguistic analysis of 'be' can shed useful light on the Greek concept of being, the same
relation ought to hold between an analysis of the Sanskrit verb and the Indian concept of being.
Since I am not an Indologist, I offer this parallel only for what it may be worth, as a heuristic hypothesis and as a challenge to Sanskrit scholars and specialists in Indian
philosophy. I shall limit myself to the Greek material, and proceed in two steps. First I shall report some of the results of the linguistic analysis of the Greek verb which I have published
elsewhere. Then I shall apply this analysis to the interpretation of two key passages for the development of the terminology and concepts of Greek ontology. The first passage is from the poem of
Parmenides, where the concept of being makes its first appearance in the philosophical tradition of the West. The second passage is Plato's initial exposition of the doctrine of Forms in the
Phaedo, where we have the first full-scale statement of Plato's own ontology.
I begin, then, by summarizing some results of the linguistic analysis. One central feature of my account is the claim that the verb 'be' in Greek -- and, I dare say, in
Indo-European generally -- is primarily and fundamentally a copula and not a verb of existence, as comparative linguists have usually held. There is no evidence for the traditional assumption that
the verbal root es originally meant only existence (or the like) and gradually declined into the use as "mere copula." By claiming that the copula uses the primary, I meat, not only that
they are factually (or statistically) predominant front the earliest texts, but also that they provide the only possible point of departure for a theoretic account of the whole system of uses for the
verb. I do not claim that the copula uses are older than the others, but only that if we regard them as older we can understand how the other uses could have developed from them.
Talk of "development" here is a mere theoretical convenience, like a myth of creation or an original social compact, a conceptual device that serves to clarify the relations of logical priority and
dependence between different factors in a complex system.
From the point of view of the language, then, the primary or central use of the verb is as a copula. (4) By a copula use I mean an occurrence of the verb with a predicate adjective
("I am tall"), a predicate noun ("I am a man"), or a prepositional phrase ("I am in the conference room"). The copula use includes the so-called 'is' of identity: "I am C.K." ; "I am the first
speaker this afternoon." The verb 'be' as copula in Indo-European is characterized by two features which are important for the philosophical development. The first I call the locative, the
second the durative aspect. By the locative feature I mean the fact that the verb serves for predication in general, not only with nominal predicates (predicate nouns and adjectives or
participles) but specifically for statements of place, like "We are in this room." This locative use seems so essential to the meaning of the verb that we find Aristotle saying that most people
believe that whatever is, is somewhere; what is nowhere is nothing: for Greek common sense, a thing cannot really be unless it is somewhere. Beginning with Plato, some philosophers will deny
the necessity of this connection between being and being in some place. But it has a strong intuitive hold on the Greek feeling about "what is."
The second feature of the Indo-European copula, the durative aspect, is even more decisive for the Greek view of being. This is the aspect which contrasts 'be' with 'become,'
eimi with gignomai as copula verb (and as with bhu in Sanskrit). What is at issue here is not simply the aspectual opposition familiar in comparative linguistics,
where the present-imperfect stem is contrasted with aorist and perfect, but a more general linguistic contrast between being in a state or being in a place, on the one hand, and change of state or
change of place on the other hand. This general aspectual contrast is best described as an opposition between stative and mutative, or static and kinetic. We can
illustrate the opposition in English by contrasting "I am tired" with "I become tired," "I am tall" with "I grow tall," "I am in Canada" with "I go to Canada" or "I arrive in Canada." This aspectual
contrast seems to be much more general than Indo-European, for it is founded in the nature of things, and there is likely to be some expression for it in every language. But it is characteristic of
Indo-European that the root es is typically, and in Greek almost exclusively, used to express the stative aspect, whereas a variety of other copulas are used for predication with a mutative
nuance (there is no single root for 'be'. There is no single Indo-European word for 'become,' as there is a single root for 'be'). There is, in short, an essential connection in
Indo-European between the idea of being and the idea of stability or remaining in the same state.
So far we have considered only the copula or predicative uses of 'be.' There are of course other, non-copulative uses, of which I will mention only two. One is the existential use,
or rather the family of uses with an existential sense. As an example we may take the familiar Homeric verse, "There is a city Ephyre in the corner of horse-nourishing Argos." The connection of this
existential use with the copula construction ("Ephyre is a city," "Ephyre is in Argos") is fairly obvious. Other existential uses are farther removed from the copula construction, but I shall not go
into these complications here.
Finally we have what I call the veridical use, where 'be' expresses neither predication nor existence but the truth of a statement or a belief. The standard veridical construction
is of the form "Things are as you say," esti tauta houto hosper su legeis, or for short, esti tauta or esti houto. Curiously enough, the ancient veridical use has recently
had a vigorous revival in colloquial English: "Tell it like it is." The distinctive features of the veridical construction are ( 1) that the verb is not construed with a predicate but with an implied
or explicit comparison to a clause of saying or thinking ("it is ... like you say"), and (2) that the underlying subject of the verb is a sentence or a sentential content roughly speaking, a
proposition: the 'it' refers to a sentence, expressed or understood. The importance of this veridical use in ancient Indo-European is reflected by the widespread use of the root es, and
above all its participial derivatives (from sant), in the sense of 'truth': in Greek ontos, toi onto, 'truly' ; legein ta onta 'state the facts' ; in archaic English we
find 'sooth' for 'truth' ; and in Sanskrit there are the familiar derivatives of sat (e.g., satya) in the same sense.
So much for the linguistic preliminaries. We have first the copula uses with their locative connotation or locative application and their durative-stative aspect. We have next the
existential uses; and, finally, the veridical construction with the related uses of the participial forms to mean 'truth.' Now my claim about the philosophic development of the Greek concept of being
is roughly this: the last-named use must be placed first. The point of departure for the philosophers is the veridical use and the notion of truth. Philosophers are primarily concerned with knowledge
or the search for knowledge, and hence with truth in speech and in thought. But as the veridical construction shows, the concept of truth involves some kind of correlation or 'fit' between what is
said or thought, on one side, and what is, or what is the case, or the way things are, on the other side. Let us call this the correlation between assertion and reality, where 'assertion' is used
neutrally both for saying that it is so and for thinking that it is so ; and 'reality' is used simply as a convenient abbreviation for the fact that it is so or what happens to be the case. In saying
that the concept of truth implies a correlation or a 'fit' in this sense between assertion and reality, I think we beg no metaphysical questions. We simply articulate the connection of ideas
expressed in the Greek locutions esti tauta and esti houto. And precisely the same connection is expressed in the modern locution "Tell it like it is."
So we see how the philosophers' interest in knowledge and truth, taken together with the use of 'be' and its participle to mean 'truth' or 'what is so,' immediately leads to the
concept of being as reality. I repeat, I am using 'reality' here not in any large metaphysical sense but simply as a convenient term in the hermeneutical metalanguage: as a mere name or counter for
the facts that make true statements true and false statements false, or for whatever it is "in the world" (for whatever "is the case") that makes some assertions and some judgments correct and others
mistaken. If I assert either in thought or in speech that the sun is shining, and if what I assert is true, then the corresponding 'reality' is simply the fact that the sun is shining.
So far I have said nothing about 'be' as verb of existence or as copula. I have shown only that starting from the veridical locutions and the notion of being as truth we immediately
get to the related notion of being as reality, in a suitably loose and generalized sense of 'reality.' I think that these two notions, together with the locative idea that whatever is, is somewhere,
and with the durative-stative aspect of the verb, are all we require for interpreting Parmenides' notion of being. Of course, we can easily see how the existential and copula uses of 'be' will also
turn up, if we think of the reality in question as expressed by a subject-predicate sentence-for instance, by the sentence "The sun is shining." For if this sentence is true, then its subject (the
sun) must exist. And the sentence uses the copula verb 'is' to predicate something of this subject, namely that it is shining, or that its light reaches us. So when we are talking about truth and
reality, the existential and copulative uses of 'be' are never far away. But I insist that if we begin to interpret the concept of being by looking for existential or copula uses of the verb, we will
not only make unnecessary trouble for ourselves; we may miss the real point. We will not only play into the hands of the linguistic relativists; we will fail to grasp the essential features of the
Greek concept of being." pp. 32-36
From: Charles H. Kahn - Linguistic relativism and the Greek project of ontology. In The question of Being. Edited by Sprung Mervyn. University Park: University of
Pennsylvania Press 1978. pp. 31-44
(2) I shall not dwell here upon the contrast between the Greek and the Heideggerian conceptions of Being. See my remarks on "static being and personal Dasein" in The Verb 'Be' in
Ancient Greek (Dordrecht : Reidel, 1973), pp. 415-19.
(3) In addition to Chapter 8 of The Verb 'Be' in Ancient Greek, see "On the Theory of the Verb 'to be,'" in Logic and Ontology, ed. Milton K. Munitz (New York :
New York University Press, 1973), pp. 1-20. In these studies I was primarily concerned with the unity of the linguistic system of the verb as ordinarily used. By contrast, the present paper deals
explicitly with the special quasi-technical use of the verb and its nominal derivatives ( by and obcria ) to formulate the philosophic concept of Being. I thus return to the topic originally sketched
in "The Greek Verb 'to be' and the Concept of Being," Foundations of Language 2 (1966): 245-65.
(4) This linguistic claim that the copula uses are fundamental for the system of the verb as a whole is logically independent of my claim that, as a fact in the history of
philosophy, the idea of truth (and falsehood) associated with the veridical uses is the primary notion for the development of the metaphysical concept of Being in Plato and Parmenides. Either claim
might be in error without the other thesis being affected either way. But of course there is some connection between the function of copula and the veridical idea. See my remarks on the notion of
truth-claim implicit in the copula use, The Verb 'Be' in Ancient Greek, pp. 186-91, 407f.
ESTI IN ANCIENT GREEK
"Whether ἐστι is orthotone ((ἒστι) or enclitic depends solely on its position: ἒστι when
initial (or quasi-initial: see below), otherwise ἐστι. This is both stated by ancient grammarians and confirmed by linguistic theory ; (1) the modern differentiation
between ἐστι copula, ἐστι to affirm existence or possibility, is mistaken. (2)
The accentual treatment of verbs in Greek will originally have been the same as in Sanskrit: all finite verbs in independent clauses unaccented when not initial, accented only when
initial. Most unaccented verbs acquired an accent under the rule of limitation, and became thereby orthotone; (3) the few forms short enough to remain unaccented acquired an accent by analogy with
related forms which were not. Only two tenses are capable of remaining unaccented in all their forms, the pres. indic. of εἰμι and of φημι;
and these are precisely the two tenses which could be enclitic in historical Greek. (4) Their enclisis is a survival from the old universal enclisis of verbs; it should operate, therefore, in the
same way in which that enclisis operated, in accordance with position. (5)
According to Herodian (i. 553) ἐστι is orthotone not only when initial but also after οὐ, καί, εί, άλλά, ώς, τοῦτο. If this
is true, it means that the original initial accentuation was extended, surprisingly, to a number of quasi-initial positions.(6) But it may, in part at least, be false: the Homeric scholia (BT on
Il. I. 63 ; cf. A on 6. 152) say expressly that ἐστι is orthotone only when initial and after οὐ."
(1) See Wackernagel, 'Der griechische Verbalakzent' Zeitschrift für vergleichende Sprachforschung, 23, , 457 ff, (= Kleine Schriften, 1955, 1058 ff.]; I give only
the barest essentials.
(2) I say 'modern' (it was propounded by Gottfried Hermann, De emendanda ratione graecae grammaticae pars I. [Lipsia, 1801], 84 ff.), but it seems to have its root in
antiquity: I notice at the last moment (what the handbooks ignore) that Eustathios (on Il., p. 880. 22, discrepantly with his remarks on Od., p. 1600. 53) and Photios (s.v.
έστιν) record a view that the accent varies with the meaning (paroxytone ἐπειδὰν αποφαινώμθἀ περί του ώc ύπάρχει [άποφαινώμεθα αυτοι περί
τοῦὑπάρχeιν τι Phot.], οἷον ἐστι πόλις Ἐφύρη, oxytone όταν πρόσ ἐρώησιν άποκρινώμeθaα); cf. also schol. T on Il. 23. 157 and
549. There seem to have been divergent practices; but we shall do well to prefer that which linguistic theory shows to have been original.
(3) Hence their recessive accent (which was then universalized in all positions: e.g. initial γνοιἑσ [Sanskrit jñeyás] supplanted by
γνἱοεσ from enclitic γνοιεσ.
(4) Enclisis of φημι is perhaps the surest token that enclisis of είμι is not conditioned by its 'weakness of meaning' as
(5) The original orthotone accents should have been (on the analogy of Sanskrit) είμι (έσσι) ἔστἓἐστὸν ἐσμἐν ἐστέ ἐίσιand similarly φημι etc.; but all save ἐστι are traditionally oxytone (είμι, φημί, etc.). Influence of the enclitic forms in all but the
commonest case? But there is some evidence for initial φῆμι: Tyrannion cited by Eustathios on Od., p. 1653. 58.
(6) 'Surprisingly', for this 'quasi-initial' position is precisely the position (second in their clause) to which enclitics tend.
From: W. S. Barrett (ed.). Euripides - Hippolytos - Oxford, Clarendon Press, 1964 pp. 425-426
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