What does lenerd mean by telling kurt that the ape found his thumb in the sixth episode of the Big Bang Theory in the first season?

The more common is "What did the loser say?" (What the loser said)

Then deliberately say this sentence quickly, so that the other party can't hear it clearly.

Then when you can't hear clearly, the other person will ask, "What?" (what? )

I fell into each other's trap and became a loser.

So Leonard's sentence "What does an able man say when he finds his impossible thumb?"

Actually, it's insulting that Kurt is a primitive man.

Homo habilis is a homo erectus, which first evolved from an ape to a human being.

Moreover, Leonard said this sentence for so long and so fast that Kurt would definitely not understand it and would definitely reply "What?"