Platon ( Hi-lia?p-gi : Πλ?των; cheng 427 ni - cheng 347 ni ) s? Hi-lia?p t? ko?-tian si-t?i e tiat-ha?k-ka ia?h so?-ha?k-ka . Sokrates s? i e l?u-su, Aristoteles s? i e ha?k-seng.