"Hey Loogy!" I said.

"I'm not Loogy" he replied.

"You are to me pal. When you walk like a duck, look like a duck, and
quack like a duck, I call you a duck.
You might say you're Donald, or you might say you're Daffy.
But you're just a duck to me."

"But, but, but you can't prove I'm Loogy," he whined.

"You're not listening, Loogy. Goodbye," I said.

And I don't expect Loogy will ever understand.
A duck is a duck no matter what he thinks his "name" is.
Same for a Loogy.
Crazy as a loon. Doesn't even know he's a Loogy.

Jim - Some crazy folks have redeeming qualities. Loogy's just crazy.