It took replay for TV viewers, but the players and coaches see it from a different perspective in real time. Plus, there was the added benefit of the Cowboy coaches in the booth looking at replay and confirming it on the headset Garrett wears. Between Garrett’s own eyes, the eyes of other coaches and players, Cooper’s indication based on his actual participation in the play and the coaches in the booth confirming it with replay, it’s pretty silly to suggest Garrett had no idea and only threw the flag because the ref goaded him into it.
On top of that, he didn’t have to dig the flag out of his pocket to throw it after having words with the ref, he had already pulled it out. Add in the common sense that if Garrett didn’t actually know it was a bad call there would have been nothing to be mad about or confront the ref about ....