Cartoon network says for a show to be picked up by them, the show needs "heart, fart and smart", i.e. it needs to be emotional, silly and juvenile, and more than an intellectual insult.
However, the cartoon network pilot I worked on didn't get picked up, though you could argue it had all these things.
So... I don't know. Some executive just has to like it, I guess.
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I can read facial expressions. I did the test.