Kick logic out and do the impossible!
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Forget Mudflap's jaw, check out the asteroid-sized chin on Sarge!
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A chin is the lowest part of the jaw on creatures with mouths. Transformers have had chins since as long as they've had faces. This is something of a mystery, since Transformers do not technically need mouths (and some don't have one). One must also ask why certain bots have such large chins when they don't actually need them. Humanization? Experiences with mammalian lifeforms? Required for socially acceptable stroking when deep in thought? Only Primus knows the truth.
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