We're far better at explaining the past than foreseeing the future. One small mental move borrows the first skill to repair the second.
Picture someone a week out from a big yes — a new role in a new city, or leaving a steady job to work for themselves, or a career change they’ve turned over for the better part of a year. They’ve done the sensible things: weighed the pros and cons, talked it through with people they trust, run the numbers twice. The plan feels solid now. The confidence is real. And that is exactly where the trouble likes to hide.
There’s a quiet asymmetry in how the mind handles time. We are fluent at explaining the past and clumsy at foreseeing the future. Ask why a project failed after the fact and the reasons pour out, specific and vivid. Ask what might go wrong before you begin and you get a thin, careful list — the obvious hazards, nothing that really threatens the plan you’ve already fallen for. Foresight feels harder than hindsight because, in a way, it is.
In 1989, three researchers — Deborah Mitchell of the Wharton School, Jay Russo of Cornell, and Nancy Pennington of the University of Colorado — published a study with a fitting title: “Back to the Future.” They wanted to know whether the way we frame a future event changes how well we can reason about it. It does, and the gap is large. Imagining that an event has already happened — not that it might happen, but that it has — increased people’s ability to correctly identify reasons for the outcome by about 30%.
It’s a strange, useful result. The future tense keeps us hopeful and abstract. The past tense makes us concrete. A decision that “might not work out” stays comfortably vague; a decision that “failed” demands an explanation — and the mind, once asked for one, obliges.
The cognitive scientist Gary Klein turned that finding into a method he named the pre-mortem, in a 2007 piece for the Harvard Business Review. A post-mortem examines a body to learn what killed it. A pre-mortem runs the autopsy first — while the patient is still alive and the diagnosis can still change anything.
It works like this. Before you commit, place yourself a year into the future. The decision you’re about to make has gone badly — not catastrophically, just clearly, undeniably wrong. Now write the story of how. Not what could go wrong, in the conditional, but what did go wrong, in the past tense. Where did it come apart? What did you wave away that, looking back, was obvious all along?
The shift sounds small. It isn’t. A standard risk check — “so, what are the risks here?” — runs straight into our optimism and our reluctance to look negative about a plan everyone’s invested in. Klein’s insight was that assuming the failure has already occurred lifts both brakes at once. You’re no longer casting doubt on a live plan; you’re explaining a fact. That licenses a candour, and a level of specific detail, that “any concerns?” almost never gets.
It’s why people who study decisions for a living keep the technique close. Daniel Kahneman, who spent a career documenting the ways confidence misleads us, wrote in Thinking, Fast and Slow about his own extensive and successful use of Klein’s pre-mortem. When the man who catalogued overconfidence reaches for a favourite remedy against it, it’s worth borrowing.
Klein built the pre-mortem for teams, but the move works just as well for one person facing a personal decision. Set aside ten minutes before the big yes. Write the date a year out. Then write, in plain past tense, the honest account of how this went wrong — the version you’d give a friend over coffee, a little embarrassed.
What you’re after isn’t a reason to abandon the plan. It’s the one or two failure points that are both real and fixable: the conversation you didn’t have, the runway you overestimated, the assumption you never tested. Some of what surfaces you can address before you start. Some you can’t — and knowing that going in is its own kind of preparation. The aim was never to talk yourself out of the decision. It’s to make it with your eyes open.
This is the kind of move we keep returning to across the Decision Science thread at The Handbook Co. — small, borrowed techniques that hand a non-expert the judgement an expert would bring. The Career Pivot Handbook puts this one to work on the hardest version of it, where the costs are real and the future is genuinely unknown. But the exercise itself is free, and you can run it tonight. Don’t ask whether your plan might fail. Assume it already has — then go find out why.
— The Handbook Co.
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