"we're not interested in anyone who wants to spend evenings and weekends with friends and family"?
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I once interviewed as a 30-something with a company that generally only hired kids right out of college with no lives. The only reason I got the job was because the guy asked a C question and told me I had the wrong answer but I told him to look in K&R and it proved I was right.
Interesting. I bet a big part of your win was not just that you were right, but that you conveyed your disagreement without being a d*ck about it. That's a lot harder than being right.