Mechanic: Clock Didn't Start

[Ron]

Interesting thing happened in last night's game........35 seconds left in a close game. Team A inbounds the ball, quickly shoots a 3, and hits it. Then, Team B inbounds and is fouled immediately. The problem.....the clock didn't start. Neither my partner or I were keeping a count during the play, but clearly, time should have come off the clock. I took 2 seconds off the clock. More time had probably elapsed, but I didn't want to take *too* much off. The issue, I believe, is "direct knowledge" and "official information". Is knowledge that time *should* have come off good enough information to take some time off? Or, do we need to have been keeping a mental count to justify taking any time off?