Left-Handed People

We went for lab work yesterday. A man sitting opposite me commented, "Left-handed people aren't as intelligent as others."
Silence.
I said, "I think that's usually phrased as, 'Left-handed people are more creative than others.'"
The lab tech turned, put her hands on hips and exclaimed, "Thank you!"
"Well, it's probably from making up all those answers."
Silence.