What does it matter if the teacher is from Crete? Being a Cretan does not make one a cretan. You don’t need to be a stoic to realize that.

This is likely a reference to the Epimenides paradox.

https://en.wikipedia.org/wiki/Epimenides_paradox

You’re probably right, but this is not a paradox. There is an answer that is logically sound without conflating the semantics beyond their reasonably-assumed meaning.