The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Sophist by Plato: processes of truth and error, Aristotle, in the next generation, gave
distinctness; he brought them together in a separate science. But he is
not to be regarded as the original inventor of any of the great logical
forms, with the exception of the syllogism.
There is little worthy of remark in the characters of the Sophist. The
most noticeable point is the final retirement of Socrates from the field of
argument, and the substitution for him of an Eleatic stranger, who is
described as a pupil of Parmenides and Zeno, and is supposed to have
descended from a higher world in order to convict the Socratic circle of
error. As in the Timaeus, Plato seems to intimate by the withdrawal of
Socrates that he is passing beyond the limits of his teaching; and in the
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