Chopping clock vs. starting clock

[Smitty]

What exactly do you have definite knowledge of? What would you do if you called it back? Do you just do a "do over" and hope for the best this time? I don't think you can do anything at all unless you saw that the clock didn't start on the tip. And even if you did notice the clock didn't start on the tip and then you let the rest of the play complete, what, by rule, can you do at that point? In those situations I like to confer with the timer before I put the ball in play to watch me and start the clock when I chop it in. It's best to avoid that situation by making sure we're all on the same page, since you have the luxury of the dead ball to take care of it with the timer.