I don't know where you are headed, but this is from Futuyma's newest edition (note I cannot find the language you quoted above from the old edition in the new one).
"Environmental factors may affect the rate of mutation, but they do not preferentially direct the production of mutations that would be favorable in organism's specific environment" p.26, 3rd edition.
Does this help you?
Does this help you?
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Yes. Thank you. That confirms my understanding.
I've tried to read this stuff carefully with a layman's insight and the non-directed nature of mutation is a very key point. That's why I was surprised and followed up when I was told I was wrong about it.