The just-in-case test

If you can replace an item in 20 minutes for $20, you can let it go.

Why it works

Most "just in case" keeping is the brain over-weighting a rare, low-cost future need against a certain, ongoing present cost (space, maintenance, visual noise). The 20/20 rule recalibrates that math: it makes the true replacement cost explicit and usually trivial, dissolving the anxiety that keeps clutter in place.

How to do it

1. For any "I might need this someday" item, ask: could I re-buy it within 20 minutes for ~$20?
2. If yes, release it; the option to re-acquire is the real asset, not the object.
3. Reserve genuine keeping for the rare items that fail the test (irreplaceable or expensive).

Evidence

A heuristic from The Minimalists that operationalizes the well-documented loss-aversion bias — we overvalue what we already hold and underweight how easily it can be replaced. (mechanistic)

The "20/20" numbers are an illustrative rule of thumb, not a studied threshold; the loss-aversion mechanism it targets is real.

Sources

• Kahneman & Tversky, loss aversion / endowment effect (people overvalue items they already possess)

Common mistake

Treating the test as literal accounting and exempting almost everything as "special" — the point is to expose how rarely the just-in-case fear is justified.