Indiscernibles and Plato’s Forms vs. Parmenides

  • Jenny Carmichael
Keywords: philosophy, plato, socrates


In Parmenides, the young Socrates defends several candidate forms against Parmenides, who makes five objections: the objection of forms of common things, the question of the part vs. the whole, the third man argument, infinite regress, and the greatest difficulty problem. I define forms in terms of Leibniz’s Principle of the Identity of Indiscernibles (PII) in an attempt to overcome Parmenides’ opposition. I show that the main force in Parmenides’ objections consists of absurdities that emerge in relations between forms and particulars: absurdities that are avoided if the form and its instantiation in the particular are identical.

How to Cite
Carmichael, J. (2013). Indiscernibles and Plato’s Forms vs. Parmenides. Stance: An International Undergraduate Philosophy Journal, 6(1), 37-44. Retrieved from