It is often thought that Plato sets himself an important task in the Sophist – that of disentangling different uses, or senses, of the verb einai. Plato is thought to have confused different senses or uses of the verb in his philosophical youth; here he is supposed to correct his mistake, and to mark out a danger area for his successors.1 Plato is also often supposed, by commentators, to have set himself the task of disentangling a second confusion – a (...) confusion between the mē on and the mēdamōs on : on this view, the mē on is revealed as the negation of the on, whereas the mēdamōs on is the opposite of the on. (shrink)

The Eleatic Visitor speaks forcefully when he insists, ‘Necessarily, whenever there is speech, it is speech of something; it is impossible for it not to be of something’. For ‘if it were not of anything, it would not be speech at all; for we showed that it is impossible for there to be speech that is speech of nothing’. Presumably, at 263c10, when he claims to have ‘shown’ that it is impossible for speech to be of nothing, the Visitor is (...) referring back to the Parmenidean puzzles at Sophist 237ff. (shrink)

To ensnare the sophist of the Sophist in a definition disclosing him as a purveyor of images and falsehoods Plato must block the sophistical defence that image and falsehood are self-contradictory in concept, for they both embody the proposition proscribed by Parmenides — ‘What is not, is’. It has been assumed that Plato regards this defence as depending on a reading of ‘what is not’ in its very strongest sense, where it is equivalent to ‘what is not in any way’ (...) or ‘nothing’. Likewise, the initial paradoxes of not-being are seen as requiring that to mē on be understood in this way, that later designated by Plato as the opposite of to on or ‘being’. On this interpretation, Plato's counter-strategy is to recognise a use of to mē on which is not opposed in this strict sense to being, but is indeed a part of it and is ‘being other than’. In a stimulating article, R. W. Jordan challenges this account. I shall briefly attempt to show that his objections are not decisive and that his own interpretation is open to question. Jordan makes the interesting suggestion that a distinction between two senses of not-being, where one is equivalent to nothing and one is not, dates from the middle dialogues — particularly from Republic V, where objects of agnoia are mēdamē onta and objects of doxa are both onta and mē onta. He concludes , ‘Malcolm's view, then, seems to amount to this: that Plato is now extending the moral he draws about objects of belief in the Republic to cover forms. Forms too now are seen to be both being and notbeing.’. (shrink)

To ensnare the sophist of the Sophist in a definition disclosing him as a purveyor of images and falsehoods Plato must block the sophistical defence that image and falsehood are self-contradictory in concept, for they both embody the proposition proscribed by Parmenides — ‘What is not, is’. It has been assumed that Plato regards this defence as depending on a reading of ‘what is not’ in its very strongest sense, where it is equivalent to ‘what is not in any way’ (...) or ‘nothing’. Likewise, the initial paradoxes of not-being are seen as requiring that to mē on be understood in this way, that later designated by Plato as the opposite of to on or ‘being’. On this interpretation, Plato's counter-strategy is to recognise a use of to mē on which is not opposed in this strict sense to being, but is indeed a part of it and is ‘being other than’. In a stimulating article, R. W. Jordan challenges this account. I shall briefly attempt to show that his objections are not decisive and that his own interpretation is open to question. Jordan makes the interesting suggestion that a distinction between two senses of not-being, where one is equivalent to nothing and one is not, dates from the middle dialogues — particularly from Republic V, where objects of agnoia are mēdamē onta and objects of doxa are both onta and mē onta. He concludes, ‘Malcolm's view, then, seems to amount to this: that Plato is now extending the moral he draws about objects of belief in the Republic to cover forms. Forms too now are seen to be both being and notbeing.’. (shrink)