Common sense doesn't require proof. If "groin kick, face punch" doesn't work for you, it will be your problem and not the "technique problem". You don't need any video to prove whether that will work or not.
If your opponent's kick can reach to your body, your kick should be able to reach to his rooting leg too. If you don't have good timing to kick your opponent's rooting leg when he kicks you, that will be your problem and not the "strategy problem".
Both logic technique combo and logic strategy don't need any proof.
A: Dear master! You told me that every time my opponent punches me, I should kick him.
B: Yes! Because the leg is longer than the arm.
A: But why this strategy doesn't work for me? Can you prove it work?
B: Even it works for me. It may not work for you. You just need more training.
Your thought?
If your opponent's kick can reach to your body, your kick should be able to reach to his rooting leg too. If you don't have good timing to kick your opponent's rooting leg when he kicks you, that will be your problem and not the "strategy problem".
Both logic technique combo and logic strategy don't need any proof.
A: Dear master! You told me that every time my opponent punches me, I should kick him.
B: Yes! Because the leg is longer than the arm.
A: But why this strategy doesn't work for me? Can you prove it work?
B: Even it works for me. It may not work for you. You just need more training.
Your thought?