One of the researchers on my Family History Library trip found a transcription of a death record for a 19-year old relative that indicated he was married. She was beginning to search for the wife (and possible child or children) in the following census record. I suggested she look at the original death record to see if there were additional clues about the wife on the certificate.
There certainly were. The certificate had been transcribed incorrectly. He was single, not married.
Don't forget that the originals matter and reference them when you can.