“And you, I take it, are Red Dorakeen?” “That is correct. Anything I can do for you?” “As a matter of fact… — Roger Zelazny

After signing it, he added the postscript: By the time you read this, you will already be dead.

“...And I have seen stranger things in a long and colorful career.”

“Exactly. So what is the problem in believing my story?”

“You’ve nothing to back it up with. Even if you’re right, I’m still right in not believing without evidence.”