Re: True victory?
A friend of mine was once asked by a friend of his to show him a technique from Aikido. My friend shows him nikkyo. The guy begins to resist, my friend stops his application. The guy says, "I told you it wouldn't work." My friend says, "I value our friendship too much to injure you to prove a point."
This is similar to how one should treat a student. How you respond though will vary depending on the individual.