And as a physicist I totally agree! I am not biased, I just based my opinion on my observation which concern myself and the reasons why I believe I stutter: this is not according to some religious belief, but because I can feel when, how and why I stutter (which I will omit). In view of all this, I couldn’t see any hereditary correlation in the reasons found for my stuttering problem, hence my assumption. Of course I am not blind and I am seeing how many stutterers have someone with the same condition in their family. I’ll consider looking into the matter