Depends.
We all watch plays, then the replay and have a strong opinion on what did or did not happen. In some of those we are confirmed right or wrong. But in others, it is clear to virtually everyone watching EXCEPT THE REPLAY OFFICIAL what did or did not happen. Just because they have the power to make an incorrect choice, doesn’t mean we need to admit we were wrong, when we can see we are not.
In the case of Tua, what happened in the Bills game was not hidden, in any way, shape or form. In order…
1) Tua’s head bounces off the turf on the push;
2) Tua gets up and shakes his head;
3) Then Tua wobbles;
4) Finally, Tua would have collapsed, were he not held up by his linemen.
Clearly, these are signs of trauma to the brain and concussion possibilities.
Nobody with their own brain intact- can deny what they saw!
Fish Mgt. + their HC did!