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are certainly degrees of evidence by which they are supported. The traditions of the oral discourses both of Socrates and Plato may have formed the basis of semi-Platonic writings; some of them may be of the same mixed character which is apparent in Aristotle and Hippocrates, although the form of them is different. But the writings of Plato, unlike the writings of Aristotle, seem never to have been confused with the writings of his disciples: this was probably due to their definite form, and to their inimitable excellence. The three dialogues which we have offered in the Appendix to the criticism of the reader may be partly spurious and partly genuine; they may be altogether spurious;--that is an alternative which must be frankly admitted. Nor can we maintain of some other dialogues, such as the Parmenides, and the Sophist, and Politicus, that no considerable objection can be urged against them, though greatly overbalanced by the weight (chiefly) of internal evidence in their favour. Nor, on the other hand, can we exclude a bare possibility that some dialogues which are usually rejected, such as the Greater Hippias and the Cleitophon, may be genuine. The nature and object of these semi-Platonic writings require more careful study and more comparison of them with one another, and with forged writings in general, than they have yet received, before we can finally decide on their character. We do not consider them all as genuine until they can be proved to be spurious, as is often maintained and still more often implied in this and similar discussions; but should say of some of them, that their genuineness is neither proven nor disproven until further evidence about them can be adduced. And we are as confident that the Epistles are spurious, as that the Republic, the Timaeus, and the Laws are genuine.
On the whole, not a twentieth part of the writings which pass under the name of Plato, if we exclude the works rejected by the ancients themselves and two or three other plausible inventions, can be fairly doubt