DNA is relatively unstable and can be mutated, I.E. Blond hair, blue eyes, six fingers stuff like that.
English
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Fingers will always be fingers, hands will always be hands, legs will always be legs.
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Unless a mutation changes them into something else. You are saying that a word defines science?
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If you have a hand and throw glitter on your hand you still have a hand. The glitter will make no difference.
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Glitter isn't changing DNA...