Back and Forth: the endlessly recursive joke

A: “We will embarrass our descendants, just as our ancestors embarrass us. This is moral progress.”
B: “That’s only a superficial view, eventually we’ll come to recognize how wise our ancestors truly were.”
A: “As I was saying, I’ll embarrass you.”
B: “Oh you’re right, you were right all along!”
A: “But then that means you‘re right! Now I can’t believe the things I said!”
B: “Don’t worry, that is moral progress.”
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