It's not a tone argument. An argument from a legal department is a threat. And if it's not actually a threat, it's certainly a very significant perceived threa

It's not a tone argument. An argument from a legal department is a threat. And if it's not actually a threat, it's certainly a very significant perceived threat. And lawyers and society definitely understand that. The letter itself wasn't terrible, but it definitely contained a threat, and claiming it is a tone argument denies that. Also, do you have a reference to PG's "hierarchy of disagreement"? Sounds interesting.