Is It OK to Use the Word Fair?

When someone says you cheated, you get all defensive. When it gets dropped on you, it's some goes, Hey, we just want what's fair. We need, I'm not being fair. And they could trigger you to make it a deal you shouldn't have made. People often say it out of defensiveness. But for the same ends, you know, get the inside to change your mind,. providing no evidence whatsoever as to why they should.