I think that’s one of the most important rules. When you’re in doubt if the candidate suits you fine it does mean no hire. I believe there are people out there who are valuable although they aren’t able to sell themselves during an interview and after all they’d appear to be great hires. Unfortunately I met none of them. On the other hand I met dozens of people who were hired despite doubts and they’ve proven the decision to be wrong.
It doesn’t really matter which area doesn’t suit you well. Maybe the guy is perfect when talking about his technical skills but red lights appear when he becomes overly curious before even the decision is made. Maybe the girl doesn’t show much will to unwind herself. Possibly the candidate is willing to learn but the starting point is, well, way too low. Or you just feel under your skin something is wrong with the applicant. When in doubt say no.
It sounds harsh but it works.
Whole avoiding hiring mistakes series.