Being afraid of looking stupid has silenced more smart people than actual stupidity ever did.

Rooms are full of people holding the right answer and saying nothing, because being wrong out loud feels far more expensive than staying quiet. It is not. Quiet costs you the correction, the credit and the practice, and it charges all three invisibly, so the bill never arrives anywhere you can see it.

Speak once this week when you are about eighty percent sure. Say the number out loud if it helps, that you think it is this but are not certain. Being wrong in front of people turns out to be a much smaller event than the version you rehearsed.