How can you argue against it?
The moment you’ve been labeled as such, everything you say will be considered “crazy.”
It’s inarguable, because craziness is not logical, so the person to say it typically wins the argument, with the so-called crazy person storming off in frustration.
But the person who says “You’re acting like a crazy person” is in fact uncreative, afraid and small.
He cannot effectively argue the point, and instead resorts to creating an inarguable – and illogical – frame.
Recognize that that person is weak, and can easily be destroyed.
Because he revealed his biggest weakness: His inability to argue the point.
So pick on his weakness with a genuine smile on your face.
And you will find you can win.