Flashed card

[Belly Buster]

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.

[tommyt]

i would personally just tell the player i saw the card. if he wants to lie thats his problem. but you know what you saw.

[Belly Buster]

I don't think he was lying, I figured 4d was his other card.