I'm not sure why I'm jumping in to defend interviews, but... this merely proves that interviews are not perfect at evaluating competency. Suppose that the resul

I'm not sure why I'm jumping in to defend interviews, but... this merely proves that interviews are not perfect at evaluating competency. Suppose that the result of a typical interview is X% determined by competency, and (100-X)% determined by other factors. It could be possible to provide a service that helps you quickly improve the "other factors". And yet if X is large enough, interviews might still be of some value for evaluating competency.