What are 'peremptory challenges'?

What are 'peremptory challenges'?

A peremptory challenge means that they don't have to give any reason. They don't even have to ask you any questions. They can just look at you as say, "Thank you for coming. You're dismissed." And they may do that because you look impatient, angry, because they know by looking at you, you're the wrong age, the wrong color, and the wrong sex. That you don't fit the profile of jurors they want. And they can't be called on that. The other person doesn't get a chance to ask you questions. You're just dismissed.