How did they know it was going to work?
Nobody knows until they tried. Nobody knows but they have previous experience of a similar situation. Nobody knows but they have considered what’s the worst that can happen.
Nobody knows if you already tried once or a dozen times before and this time will be different.
But once you try you’ll know. You’ll know it works or doesn’t. It could work if only you adjusted or adapted.
What do I need to know to get the best outcome.