Okay, so the first one he mentions isn’t really that great, but keep going. They get better.

I think the second one and the fifth one are the two I instantly recognised. I mean, who hasn’t heard of the grandfather paradox?

On an amusing side note, I recently started playing a Steam game called ‘Reus’ in which you have four titans who can sculpt the planet.

One of the questions on the loading screen is: “Can the rock titan create a rock so heavy he can’t lift it?”

And, just because it’s cool, here is a link to a list of paradoxes on Wikipedia.