What to Prune in the Fall

Is the fall months the best time to carry out pruning procedures, well unlike popular belief the answer to that question is no and there are reasons for this but still is the fall months the best time of the year to prune? The answer to that question is it all depends on the reason or the goal of pruning or not to prune during this time of the year. In fact, both sides are right but as said there must be a reason for WHY.