A Third Of A Pie

"You can't have half of a P.I.E. You've gotta have a whole P.I.E."

-Johnny Ghost.

Johnny Ghost, paranormal investigator extraordinaire. He'd dealt with all sorts of paranormal entities. He'd succeed 9/10.
After all, he was Johnny Ghost! He could handle anything thrown at him!

But, what about when he's faced with an issue that's not so simple.
He knows he's not crazy, but how do you prove that when you're hearing voices in your head, blacking out only to find yourself in an unfamiliar location, or even when you don't know your own childhood?

"Perhaps you're just crazy."

"I'm NOT insane!"