Early stages of a tournament. Guy in early position goes to fold his cards but makes a hash of it and Qd is flashed as the cards head to the muck face down.
I mention to the table that I saw an exposed card. I'm sure some of the players have seen it while others won't have done.
The guy then says "It was 4d". I say that I saw a different card but don't mention which card it is.
Surprisingly no one then asks me what card I did see, and the game moves on.
Question: What is the correct etiquette here? I'm trying to keep the game fair but maybe I should just say nothing.