A few examples (in approximately increasing order of controversy):
If you proceed anyway...
- Identify knowledge that may be dangerous. Forewarned is forearmed.
- Try to cut dangerous knowledge out of your decision network. Don’t let it influence other beliefs or your actions without your conscious awareness. You can’t succeed completely at this, but it might help.
- Deliberately lower dangerous priors, by acknowledging the possibility that your brain is contaminating your reasoning and then overcompensating, because you know that you’re still too overconfident.
- Spend a disproportionate amount of time seeking contradictory evidence. If believing something could have a great cost to your values, make a commensurately great effort to be right.
- Just don’t do it. It’s not worth it. And if I found out, I’d have to figure out where you live, track you down, and kill you.
If your goal is to accurately judge intelligence this may not be a good approach. Universities moved away from basing admissions decisions primarily on interviews and towards emphasizing test scores and grades because 'long, involved conversation' tends to result in more unconscious bias than simpler, more objective measures when it comes to judging intelligence (at least as it correlates with academic achievement).
Unless you have strong reason to believe that all the unconscious biases that come into play in face to face conversation are likely to be just about right to balance out any biases based on preconceptions of particular groups you are just replacing one source of bias (preconceived stereotypes based on group membership) with another (responses to biasing factors in face to face conversation such as physical attractiveness, accent, shared interests, body language, etc.)