Some of these anecdotes about Keynes remind me of the bit from Theory of Everything where Hawking and his wife are entertaining a guest. The guest asks Hawking

Some of these anecdotes about Keynes remind me of the bit from Theory of Everything where Hawking and his wife are entertaining a guest. The guest asks Hawking what he is working on and Hawking replies that he is attempting to prove black holes don't exist. "But I thought you'd proven that black holes do exist?" inquires the guest. "That was my Ph.D. thesis," says Hawking.