The man is a FOOL!
If we listened to everyone who said "That's impossible" we never would have left the cave.
Think of all the "impossibles" out there... Broadcast energy, x-rays, manned flight, space travel, sailing around the world, the Earth revolving around the SUN!
Wasn't it Christopher Reeve who said "So many of our DREAMS at first seem Impossible, then they seem Improbable, and then when we Summon the Will, they soon become Inevitable."
Oh! About Hitler... How do WE know That's not how Hitler died?
REMEMBER The only reason the Germans surrendered was because their leader was found DEAD with a bullet in his brain.
If that hadn't happened... They would have fought to the last man.