1. Level 1 - Truth: The focus is on factual accuracy and objective reality.
2. Level 2 - Influence: The goal is to affect your beliefs or actions, like trying to sell you something.
3. Level 3 - Signaling: It's not about truth, but showing group allegiance and loyalty.
4. Level 4 - Word Salad: The discussion is incoherent or just playing with ideas, without concern for truth or influence.

via Zvi Mowshowitz