1. there is always a basis for a rumor, no matter how untrue it appears; suspicious things usually mean that something is wrong

1. Jayne bought a new can of spray paint the day the graffiti appeared. She must have done it. Where there’s smoke, there’s fire.

2. I’m going to withdraw all my money from that bank. I read an article that the bank was in financial trouble, and where there’s smoke there’s fire.