That's a ridiculous answer because it doesn't satisfy the question. The issue is that in boxing, blocks, avoidance and counters are part of boxing. How are hits scored, and damage adjudicated. If we are in a fight, and you throw a right jab, I block it with my my left and throw a straight into your face will you accept the hit or avoid it? If you avoid it how do you do it that makes sense or will you simple say I duck...

The Tabletop section might find you better traction for this idea.