I read, about it when you attack the person instead of the person’s argument.
I think it’s called argumentum ad hominem,
That’s what poor politicians do not what you do in moral philosophy.
Anyway Michael Tomasello’s life work is evolutionary anthropology.
His book which Simon Payton is describing a natural history of human morality.
It’s not a book about moral philosophy. It’s a thesis on how humans developed morals, from different scientific perspectives.
I think the reason there’s no answer in this argument is because people are making arguments from different areas.
For example
It’s if you have a new bridge crossing a river.
One person might discuss how the bridge was constructed say for example a structural engineer.
Another person might look at the cost of building the from a moral point of view. For example if in the area similar bridges there was a very high rate of suicide by people jumping from them.
The structural engineer and the moral philosopher are both discussing the common subject the “bridge” but from different disciplines.