Tongue Twister

A big bug bit the little beetle but the little beetle bit the big bug back.

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If you understand, say “understand”.
If you don’t understand, say “don’t understand”.
But if you understand and say “don’t understand”.
How do I understand that you understand? Understand!

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I thought a thought.
But the thought I thought wasn’t the thought I thought I thought.
If the thought I thought I thought had been the thought I thought, I wouldn’t have thought so much.