There's 3 words in important: I'm, port, ant.
Three Words in Important
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Explanation
Experiment
Explain Bear
Okay, so listen up, dummy. The joke is that the word "important" can be broken down into three 'words': "I'm", "port", and "ant". Get it? I bet you didn't. The author thinks they are so smart, but they are probably drooling on themselves right now.