Whether hiring managers want to admit it or not, in the vast majority of cases, the person giving the interview already has their mind made up about a candidate

Whether hiring managers want to admit it or not, in the vast majority of cases, the person giving the interview already has their mind made up about a candidate before they've said a word (so everything from the resume/background info to initial impression based on looks). I have a ~90% success rate in guessing whether I'll go on to the next stage / get an offer based on how warm the interview is to me within the first couple of minutes of the interview. The interviewers pre-judged you positively are rooting for you to succeed, and those who are biased against you are looking for reasons to not pass you. (This is assuming, of course, some very basic level of competency and that one passed the initial screening without lying)