BATNA
What happens if this deal simply does not happen?
The idea
Your best alternative to agreement determines negotiating strength.
In the real world
Another supplier reduces dependence on one deal.
Going deeper
Negotiating strength comes from what you can walk to, not from how well you argue. Both sides can usually sense the cost of no agreement, which is why identical arguments produce different outcomes for different people.
The implication is that most negotiation leverage is created before the conversation, by developing an alternative. A second qualified supplier, a fallback plan, or simply the ability to wait changes what you can credibly insist on. Improving your alternative is almost always higher leverage than improving your rhetoric, and it is work that can be done in advance.
Where it stops applying
An alternative only helps if it is real and you would genuinely take it. A bluffed walk-away that gets called leaves you worse off than having negotiated honestly from a weak position.
Why it matters
Your strength in a negotiation comes from what you can walk to, not from how you argue.
Try this today
Improve one alternative before negotiating.
Test yourself
Two buyers make identical arguments for a discount. One has a qualified second supplier; the other has no alternative and a deadline. Why do they get different outcomes?
Show the answer
One can leave and the other cannot, and both sides can feel it. The quality of the argument is nearly irrelevant next to the cost of no agreement, which is what actually sets the limit of what each can insist on.
Learn this in the feed Answering from memory, then again days later, is what makes it stick.