If there's one thing I regret, is not bookmarking that Cognitive Thought stream, where he got a holocaust denier on, that just couldn't fathom the 6 million figure. He just thought it was impossible to kill that many people.

Cog literally had him take a random nazi camp from wikipedia, had him estimate how many people he thought could fit in a gas chamber at once, had him estimate how many gassing could have been done in a day, had him estimate how many days off for maintenance the facility could have needed, etc. At literally every possible step, he had the holocaust denier give or accept what he thought was a plausible figure, and then they put everything in a calculator. And it basically came up that that single camp would have been capable to do millions of killings by itself, with all the assumptions the holocaust denier himself made or accepted as reasonable.

Guess who quickly admitted they were wrong.