General Discussion

"They had a $900 million cost over on these stupid electric catapults that didn't work. They had almost a billion dollar cost over on the magnetic elevators," he said. "Think of it, magnets. Now all I know about magnets is this: Give me a glass of water, let me drop it on the magnets, that's the end of the magnets."

That is, of course, not how magnets work. They work just fine underwater.

"They want to use magnets to lift up the elevators," Trump said in a July 2021 interview with a Princeton professor. "I said magnets will not work. Give me a cup of water, throw it on the magnets, you totally short out the system. They said, 'How did you know that?' I said, 'Because I know that.'"

It's unclear where Trump might have got the idea that magnets don't work underwater, but it is a common myth that results in numerous debunking articles after a simple Google search.