People just want to be right. Had a lady come in to the parts store I work at, pretty upset. I ask if I can help her, but she demands to speak to the store manager ONLY. Curious, I stand and listen. She says to him, "I came here and bought wiper blades yesterday, and YOU put them on my car!"
"Yes," says the manager, "I remember. Are they not working good? I can get you a different kind."
"NO! THAT'S not the problem! The problem is, now my tire pressure light won't go off, and it was fine until you put wiper blades on my car!"
I wish to God I was kidding, lying, making it up, hallucinating, or otherwise. But this crap happened in front of me. When someone is sure they're right, they just want you to verify it for them, and nothing else. Sometimes I hate people.