I said "That's mostly wrong," not "You're wrong," because I was talking only about the information, not the person. It's not a personal failing to misremember something; it's just a lack of information that can be easily remedied. I wasn't judging you for being wrong, I was trying to help you become right.
"Wrong" is not a dirty word. Being wrong is something that happens to all of us all the time, just a step along the way toward getting it right. Me, I get things wrong constantly, which is why I'm obsessive about looking things up and finding out what's right.