"When my doubt about the Holocaust first came to me, it took me two and a half years, and I was like a reforming alcoholic. I was like one yo-yo, back and forth: believe, not believe, maybe believe, false belief, true belief. Fred was able to purge his own mind within a matter of a week. That's amazing to me. So I said: 'Fred, what convinced you?' He said: 'Ernst, it wasn't what I found, it was what I didn't find.' That blew me away. It never, ever occurred to me that a man could be convinced by something that is not there. That's what Fred said."