And the people who think these biases don't exist are the ones that overestimate themselves the most.

OVERESTIMATES HIS OWN COMPETENCE AND EXPERTISE (AS EVERYONE DOES TO SOME DEGREE); BIASED EMPLOYERS AND COLLEGE ADMISSIONS OFFICERS; SIMILARLY OVERESTIMATES THE COMPETENCE AND EXPERTISE OF JOB AND SCHOOL APPLICANTS HE SEES AS BEING MOST LIKE HIMSELF