As an interviewer, my job isn't to judge whether a candidate is prepared. My job is to judge whether they can do the job. If the interviewer says "I think you'

As an interviewer, my job isn't to judge whether a candidate is prepared. My job is to judge whether they can do the job. If the interviewer says "I think you're a good engineer", the next sentence should be "we would like to make you an offer". If I could hire people by reading their mind and understanding their ability, without requiring an ounce of preparation, I would do that.