Understanding and using tactics is relatively simple. Long-term doesn't necessarily mean over a lifetime. It can show up later in the same negotiation session. Be careful about grinding someone down on one point. They will get you back on another issue.
None are facts.
Don't be fooled. But all our prices are determined at our headquarters in Boise, Idaho. I'm afraid nothing short of a coup is going to change them. Everyone makes mistakes. The value of becoming a student of the art of negotiation is that most of us can reduce the frequency of our mistakes and increase the frequency of optimum returns.