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a know-it-all who talks big but knows nothing, and lies about facts to back up stupid ideas.
"The moon is made of cheese," he said. I asked, "How do you know?" He said, "I read it on a meme."
He told me the president was a robot. When I asked for proof, he said, "I saw it on YouTube."
He claimed the sky was green. I said, "That’s not true." He said, "I’ve got a degree in sky stuff."