Safety Moment - Is Stop When Unsure A Bad Piece of Advice?

Safety Podcast, Safety Program, Investigations, Human Performance, Safety Differently, Operational Excellence, Resilience Engineering, Safety and Resilience Incentives

What could possibly be wrong with asking worker to stop when unsure?  It seems - I said seems - like such a good and right thing to say to workers...

but is it?

I wonder if we should change this advice to start when sure?  Isn't it easier to know when you are ready to do work and opposed to being psychic enough to know when some surprise event will lead to failure.