This strikes me as ad hominen, you're evaluating the person, not their advice. "Bad people can't give honest testimony." https://en.wikipedia.org/wiki/Ad_homine

This strikes me as ad hominen, you're evaluating the person, not their advice. "Bad people can't give honest testimony." https://en.wikipedia.org/wiki/Ad_hominem https://en.wikipedia.org/wiki/Ad_hominem In fact, I think there's a strong argument for getting advice from people who have failed, because, they have lived through failure cases and I'd expect can help you avoid them. "Successful" people could be either privileged, lucky, or both, and their success may not be due to what they attribute it to. I think you want to collect as much data as you need to draw strong conclusions. I therefore favor the adage, "Who is wise? He who learns from everyone."