I'm being kinda pest with this hair-breaking problem, huh? I posted similar threads a few times, for this is a situation that often makes me lose confidence and have ridiculous doubts.
So, while combing/ brushing/ detangling hair, do you think that certain weaker strays can snap, as well as individual hairs? A friend of mine explained to me that the reason why some strays are shorter than others (on the same layer on head) is that those strays are younger and haven't yet reached the lenght of the others. Yet, I think YOUR explanation will settle me for real.
Afaik his explanation is correct.