Originally posted by mraynrand
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Don't environmental factors sometimes cause those changes in genes for cancers? If I remember correctly, breastfeeding (or not) can help inure some women against developing cancer. I know someone who has an inflammatory disease that is mitigated by another genetic factor.
If the availability of alcohol produces a reward stimulus in a person and that pathway activates the predisposition to alcoholism, I am not sure there is much of a distinction here.
Agree that knowing predisposition of risk would help. But even if you think the delineation between developing alcoholism and cancer has a bright line, I very much doubt its explained by weakness.

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