That all depends on what you believe is typical of 29-year-olds. That philosophy could be good, or incredibly bad.
I've known a couple of people that clearly assumed anyone they didn't know was an overambitious college-undergrad-turned-script-kiddie, which led them to look their nose down at people with many times more experience than them.
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I have a philosophy that everyone I don't know is 29... it has served me well.
That all depends on what you believe is typical of 29-year-olds. That philosophy could be good, or incredibly bad.
I've known a couple of people that clearly assumed anyone they didn't know was an overambitious college-undergrad-turned-script-kiddie, which led them to look their nose down at people with many times more experience than them.