The Question to Ask Before Any Big Decision
A pros-and-cons list is written by the part of you that already wants the answer. Inverting the question routes around it, and what it surfaces is usually you, six months later.
The decision has been sitting there for three weeks. Take the role or stay. Move or don't. Put the money in or leave it where it is.
You've made the list. Pros on one side, cons on the other, and the list has been roughly balanced since the first afternoon you wrote it. Every new consideration lands on one side and gets matched by something on the other, and three weeks later you know a great deal more and are exactly as stuck.
The list isn't helping because of who wrote it.
Forward reasoning is a poor auditor of itself
By the time a decision is worth agonizing over, some part of you already has a preference. That part is present while you write the list. It doesn't lie, but it does the choosing: which considerations occur to you, how heavily each one lands, which objections get a full hearing and which get a sentence.
That's the flaw in asking "how do I make this work?" The question recruits the part of your mind that's motivated to find an answer, and motivated reasoning is very good at its job. You end up with a genuinely thoughtful case for what you were already leaning toward.
Charlie Munger's habit was to turn the question over. Not "how do I succeed at this?" but "what would guarantee that I fail?"
That question is harder to cheat on. Failure modes are concrete, they're usually few, and they tend to be things you already half-know. The inverted question doesn't ask your judgment to be better. It asks it to look somewhere it wasn't looking.
Run the premortem
The practical version takes about twenty minutes.
Put yourself twelve months past the decision and assume it went badly. Not ambiguously — badly, in a way you'd be embarrassed to explain. Then write down why.
Something happens when the failure is assumed rather than hypothesized. "What could go wrong?" gets you a polite list of risks. "It went wrong; explain it" gets you the real answer, usually in the first thirty seconds, usually something you could have said before you started.
Build the avoid-list before the do-list. It's shorter, it changes less over time, and it's far more actionable. Most of what separates a good outcome from a bad one is not a brilliant move; it's not stepping in the two or three holes that were visible the whole time. That's Inversion, and the reason it works is that it isn't asking you to be smarter.
The failure mode that shows up in nearly every premortem
Do this a few times and you'll notice the same shape recurring. The plan didn't fail on its merits. It failed because at some point you made an exception, and the exception was completely reasonable.
Not the fifth exception. The first one.
Clayton Christensen wrote about this in How Will You Measure Your Life?, and his framing is the one that stays with people: it is easier to hold to a principle 100 percent of the time than 98 percent of the time.
That reads as a rhetorical flourish until you look at the mechanics. At 100 percent the decision has been made once, in advance, in calm conditions. The situation arises and there's nothing to decide. At 98 percent, the boundary is negotiable, which means every single encounter reopens the question, and it reopens under exactly the conditions where your judgment is worst: tired, pressured, and with a genuinely good reason in hand.
The first exception doesn't cost you one exception. It costs you the rule, and every future decision goes back to being a fresh argument you have to win. That's The Just This Once Trap, and the trap is that the first instance really does look cheap.
Both moves, on one decision
Consider what this does to a decision already three weeks old.
Twelve months out, the new role went badly. Why? Not because the work was wrong. Because the travel crept from one week a month to two, and there was never a specific week where saying no was obviously correct.
That premortem produces something a pros-and-cons list never would: the decision is not really about the role. It's about whether a line exists around travel, and whether that line is real. Two weeks a month, no exceptions, agreed before signing, is a decision that can be made once in calm conditions. "I'll keep an eye on it" is a decision that gets made twenty times under pressure, and loses.
What to do with the decision that's been sitting there
Give it twenty minutes and two questions.
What would guarantee this fails? Write it as a post-mortem, past tense, assuming it already happened. Take the first three reasons that arrive; those are the honest ones.
Where in that story did I make a reasonable exception? Find it, and set the line at 100 percent before you commit rather than after.
The decision may not get easier. But you'll be choosing between real options instead of arguing with a list written by someone who'd already decided.