inversion
Concept Card
What it is: Inversion is a reasoning technique that examines a desired outcome by reversing it: ask how to cause failure, how the opposite claim could be true, or what would prevent the goal from happening.
Mental model: A plan has a success path and a failure surface. Forward reasoning maps the success path. Inversion maps the failure surface first, then turns that map into safeguards, tests, and constraints.
Why it exists: People over-plan the route to success and under-plan the ways they can sabotage it. Inversion makes hidden blockers, perverse incentives, ignored constraints, and false assumptions easier to see.
What it is NOT: It is not cynicism, not post-incident debugging, not first-principles decomposition, not FMEA scoring, and not the full facilitated pre-mortem protocol.
Adjacent concepts: first-principles thinking, pre-mortem, FMEA, debugging, epistemic grounding, pattern recognition.
One-line analogy: Inversion is stress-testing a plan by first drawing the map of how it breaks.
Common misconception: The trap is treating inversion as "be negative." The point is not to dwell on failure; the point is to convert failure paths into prevention.