"Lady, that's a joke if I ever heard one. If it weren't for us, could Song Chongjin have learned his skills and lived up until now? Honestly, we've been good to him, and he's ungrateful to go against us. We're merely taking back the skills we taught him, which is only fair and square! Besides, that medicine was only meant to blur his vision, not poison him or damage his body to shorten his lifespan by ten years. We know nothing about all that. Could it be you've consulted some quack doctor from the countryside who got it wrong?..."
This was a clear refusal to admit any wrong.