Because I would like you to be successful in debating this issue, I need to inform you:
That's not a very good response. It will convince literally no one. It won't be convincing to the person you're debating. It won't be convincing to people who are observing the argument. It changes absolutely nothing.
The only effective replies are the ones that force people to think deeply:
- What makes this wrong, specifically?
and then, ask them to explain even more deeply every time they respond. e.g., "killing an innocent person is wrong."
- What makes something innocent? What makes something a person?
If you can get them to at least admit that it's a gray area, you've won.
It's like the birthday problem, but goth-themed.