To reach the conclusion in your last paragraph from the preceding one, you seem to be assuming that if a trait can be dramatically and rapidly decreased by chemical changes, it follows logically that it must have been chemically created (as opposed to learned). Are you?
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Re: Quite Right
To reach the conclusion in your last paragraph from the preceding one, you seem to be assuming that if a trait can be dramatically and rapidly decreased by chemical changes, it follows logically that it must have been chemically created (as opposed to learned). Are you?