Some of the dialogues also refer to subjects of natural philosophy, such as the Timæus. Of the logical class, there are the Politics, the Cratylus, the Parmenides, and the Sophist. Of the ethical kind there is the defence of Socrates, the Crito, the Phædo, the Phædrus, the Banquet, the Menexenus, the Clitophon, the Epistles, the Philebus, the Hipparchus, and the Rival Lovers. Of the political class there is the Republic, the Laws, the Minos, the Epinomis, and the Atlanticus. Of the midwife description we have the two Alcibiades’s, the Theages, the Lysis, the Laches. Of the tentative kind, there is the Euthyphro, the Meno, the Ion, the Charmides, and the Theætetus. Of the demonstrative description, we have the Protagoras, and of the distinctive class the Euthydemus, the two Hippias’s, and the Gorgias. And this is enough to say about the dialogues as to what they are, and what their different kinds are.
XXXIII. But since there is also a great division of opinion respecting them, from some people asserting that in them Plato dogmatizes in a positive manner, while others deny this, we had better also touch upon this part of the question. Now, dogmatizing is laying down dogmas, just as legislating is making laws. But the word dogma is used in two senses; to mean both that which we think, and opinion itself. Now of these, that which we think is the proposition, and opinion is the conception by which we entertain it in our minds.