First of all, let me tell you right up front that I say that with love.
The other day I read in some random "Overheard in the Office" pages about one worker saying to another coworker, "Hey, it's not my fault the guy is an idiot. Though it was probably my fault that I told him so." The tag line was, "But in all fairness, he didn't seem to know."
I confess I laughed until I stopped.
Let me give you an example from my everyday life. One of the things we do at my job is process applications for United States passports. The questions are really pretty basic, and one of them is your height. The State Department doesn't care about your weight, apparently, but they want to know how tall you are.
I overheard this conversation transpire between one of my coworkers and a passport applicant.
"Ma'am, you put down that you're 10 feet, 6 inches tall?"
"I don't think you're 10 feet tall, ma'am."
"No, I'm not."
"See right here? Where you wrote 10?"
"That's my shoe size."
"Well, it says 'feet'!"
In all fairness, I don't think she knew she was an idiot.