Socrates never proves that the soul is immortal, but rather states that it is much like things that are: “the soul is most like the divine, deathless, intelligible, uniform, dissoluble” (80b). This does not mean that the soul is immortal, but that there is a possibility that it is. However, this gigantic leap in logic, to assume because one thing is like another that it must contain the properties of the other, makes way for Simmias’ lyre and harmony argument. Simmias uses Socrates’ own faulty reasoning to state that the soul must be destroyed upon death:
“One might make the same argument about harmony, lyre and strings, that a harmony is something invisible, without body, beautiful, divine and divine in the attuned lyre, whereas the lyre itself and its strings are physical, bodily, composite, earthy, and akin to what is mortal. Then if someone breaks the lyre…using the same argument as you…the harmony must still exist”