We've already established that you're an intellectual coward, but going out of your way just to prove the truism above is 100% correct, is establishing something else altogether....(not of it good for you)...

AD HOMINEM'S - all that you can seem to manage in any conversation - are a sign intellectual weakness - i.e nothing intelligent, or of value, to say.

Ergo - Illustrating that Twains truism, does indeed apply to yourself.