1. I was the one that initiated the use of ethics, and the other party is the one that discards my definitions.
2. Accepting the other party's definitions in this case would involve failing to recognize an important distinction.
3. Since the difference between ethics and morality is central to understanding what I originally said about ethicality, accepting the other party's definitions negates the entire argument for no other reason than simply minimizing conflict over a very real difference of opinion.