If you are an instructor, do you welcome questions from students on the logic of techniques you are teaching?
For instance, I was practising a 1 step sparring of blocking a punch with a crescent kick. Realistically, I can't move fast enough to use a kick to block a punch in progress.
Would you be fine with a student asking the "why" of the exercise?
Good gosh yes. I encourage questions. Students in my classes are free any time to call me on anything to question me on anything, to call me on BS about anything. Then I have to have a good answer. Usually that answer is a demo of how what we are doing translates into something applicable to SD. If I can't explain it, I wouldn't teach it. And usually, that question brings up an interesting subject or premise for learning.
I've been in the situation where ranking students or teachers from other schools have heard a student question me, you know, "But, wouldn't that be dangerous because...?" or something like, "Wouldn't it be better if you...?" The teacher sometimes says something like, "hey, don't question your teacher." I always say, "no, it's ok. I like questions."
Allowing questioning opens the way for exploration, helps make sure that you know what you're talking about, prevents you from teaching ineffective or dangerous (to the practitioner) material, and most importantly, helps ensure both comfort and respect among your students. They feel ok asking you anything, and they know that you'll have the answer to their questions, and that if you don't, you'll bloody well go out and find it!
I love questions.
And sometimes, when a move is completely impractical as demonstrated, I will preface that I am well aware that it is suicidal to attempt, but that it opens the way for ________, and so we train it for (whatever reason we train it.)
But again, yes. Questions are good. Anytime, anyplace, from anyone to anyone.