Watch for one-way door creep

Recognize when a series of small reversible decisions has created an irreversible position.

Why it works

Individual decisions that are each two-way can cumulatively create a one-way door: ten small commitments that each seemed reversible may leave you in a position where reversing any one requires reversing all the others simultaneously. Sunk cost reasoning and consistency pressure make accumulated two-way doors feel like one-way ones over time.

How to do it

1. Periodically review a sequence of commitments and ask whether the accumulated position is still reversible.
2. Identify whether the cost of reversal has risen substantially since the first step.
3. If you detect creep, treat the accumulated position as a one-way door requiring deliberate review.
4. Distinguish sunk cost from genuine irreversibility — the past cost does not change what is reversible now.

Evidence

Sunk cost fallacy and escalation of commitment are well-documented phenomena showing people overweight prior investments when deciding whether to continue a course of action. Recognizing accumulated irreversibility is a specific application of this literature. (observational)

Irreversibility is sometimes correctly perceived even when incremental steps look reversible; the practice is to check explicitly rather than assume.

Sources

• Staw (1976), escalation of commitment to a failing course of action, Organizational Behavior and Human Performance

Common mistake

Concluding that because each step was reversible, the whole accumulated position must still be — without actually checking what reversal would now require.