No, you provided a qualification of why they weren't... I gave you an example of a mathematician who broke your qualification, and logically should fall into your definition of a 'quack'.

The idea being, that you'd have to back pedal, and change your qualification. Which I could then use to apply to other fields, that you deem as 'quackery', and thus undo the foundation of your argument.

Instead, you just denied the reality of what you said... I didn't count on that. Well done.