If you are correct then, yes, Bronco would have to be the the dumbest head coach in the nation to speculate on an injury without having been told by the medical staff previously.
[Bronco running off the field after the BYU/USU game clock hits 0:00. Sideline reporter approaches and asks about Taysom]
Bronco: "Ya, shredded all his ligaments. Out for the year."
Sideline reporter: "And there you have it. Taysom is done.