Original sentence: In the case of most diseases now strictly identified as genetic, such as Huntington's disease, there is a better than 99.9% corollary between having the identified gene and the disease -- and, contrastively, not having either.On the other hand, such traits as one's native language are entirely environmentally determined: linguists have found that any child (if capable of learning a language at all) can learn any human language with equal facility.With many traits, however, there is an intermediate mix of nature and nurture, and opinions about the relative importance of each will often vary widely
Edited sentence: In the case of highly penetrant genetic diseases, such as language you speak, nurture seems to be the right answer; linguists have found that any "normal" child can learn any human language.With most interesting traits, however, there is probably an intermediate mix of nature and nurture, and opinions about the relative importance of each may vary widely