It is a memorable day when you learn that there will be times in life when you have to make a quick decision based on partial information. You don't have time for study. You can't consult experts. Events are closing in and the worst thing you can do is freeze up. Your decision probably won't be perfect - in fact, bet on that - but it will be needed and whatever requires fixing will have to be fixed in the mud and the rain and the dark.
Critics may later question your actions and yet you have one powerful consolation: They weren't there. You were. And something needed to be done.