Consider a statement If $A = B$ then $C = D.$ If one were to prove it, the first thing that he/she might do is to use the fact that $A = B$ and, with some algebraic manipulation, reach the conclusion $C = D$.
Now, I proved it by using some other route.
I assumed that $C = D$ and used it to re...0
For what it's worth, I just forcefully removed the tag exponent from all the 21 questions that had it. Sorry about the editing spree.
All the questions with that tag were from October or November, so it was apparently recreated by someone a bit over a month ago. I mostly either replaced the tag ...
