I tested this. Out of 200 attempts I got 2 novel jokes that got good amount of upvotes on r/jokes.

Usually commentators say that they have heard so and so version of the joke, or that it's a repeat, but they did not

Both from opus. Sol/astra could not be funny. The versions that worked I had fed top posts from r/jokes as references and gave abstract directions.

However, the core premises were not new even if the construction was. And it's a lot of work to get something useful out.

They're not all bad! Comedian Don McMillan has done the user testing to see if AI will put him out of a job.

https://youtu.be/wBdkmI03V6g

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