Considering, how few of us actually put in the required amount of hard work in practice- in any thing, how few of us put in the right quality of effort in to anything – I think, the intent of the book is fine, laudable.
On the other hand, I was thinking, why do we gag at the idea that not everyone may have genetic potential for excelling at every task? More research- and I found, that there is a role of genetics in SOME sports at least: West African sportsmen excel at 100 M races, while central Asian athlete, excel at weigh lifting, wrestling for example.
In other words, a more sensible stand would be to say that both genetics and training (environmental factors) come into play, to produce a champion.
Applied to stammering, many of us resist the idea of genetic having a role in stammering. But, on deeper thought, I think that a genetic basis for stammering need not be the end of the world. With training and practice, one could become a good communicator, as many in TISA have done. Here are some links, which got me thinking in this direction today morning:
PS: a word of caution, no one is talking of “proof beyond doubt”. Researchers are talking only of possible connections…