01 Picture this moment
The weather looks fine, but you're hesitating at the door, worried it might rain halfway through, not wanting to cancel the whole afternoon either. This page borrows the umbrella as a metaphor, making preparation a third option: leave a little room for the small, foreseeable changes, without needing to resolve every uncertainty before you're allowed to start.
02 Try another angle
A backup plan should match the size of the thing. An ordinary walk can carry an umbrella, or take a shorter route; a major plan needs fuller information, not just a burst of encouragement to set off on. And not every risk can be canceled out by a backup plan — if the basic conditions aren't right, postponing or not going is just as reasonable a choice.
03 One step to try
Pick an everyday plan. List the two small things most likely to affect it, and pair each with an alternative you could actually use — switch indoors if it rains, eat by yourself first if a friend suddenly gets busy. Check the alternative is really doable, then decide whether to go ahead. Once you've prepared, you don't need to keep adding more assumptions. This page doesn't promise nothing will change along the way — it just hopes you're carrying an umbrella big enough, not building a roof over the whole sky before you'll leave the house.