Well, I am asking because there's a difference between arguing about opinions, and arguing about facts. It's pretty important that you understand the fact that one can not transfer preps between two different attacks or techniques, as per the rules of play. Knowing that now saves us the trouble of arguing about it at a later time, because that rule is constant. 

Just to be clear, however, you -can- cancel one technique and utilize another instead (non-prepped), there is nothing in the way of that.