The zero-based commitment test: 'Would I start this today?' — 'probably not, but...' means the qualifiers are rationalizations

Why This Is a Rule

Zero-based budgeting asks: "If we were starting from scratch, would we allocate money to this?" The same logic applied to commitments bypasses sunk cost: "If I were starting from scratch, knowing what I know now, would I choose to enter this commitment today?" This question evaluates the commitment on its current merits, not on what you've already invested.

The diagnostic power is in the hedging: "Probably not, but I've already invested so much..." / "Probably not, but it would be awkward to leave..." / "Probably not, but other people are counting on me..." Every qualifier after "probably not" is a rationalization for continuing something you wouldn't begin. The qualifiers deserve investigation, not acceptance — sometimes they reveal genuine obligations (people truly depending on you), but more often they reveal sunk cost, social pressure, or status quo bias masquerading as legitimate reasons to continue.

The scheduled cadence matters because the zero-based question never occurs spontaneously. Commitments coast on inertia — you keep doing them because you're already doing them. The scheduled review forces the evaluation that inertia prevents.

When This Fires

• During quarterly or monthly commitment renewal reviews (Review commitments quarterly (monthly for high-stakes) — don't wait for subjective dissatisfaction, gradual drift is imperceptible)
• When a commitment feels heavy but you "can't" quit — apply the zero-based question
• When rationalizations for continuing start with "but" after an initial reluctance
• Complements Review all installed defaults quarterly — outdated defaults silently steer toward yesterday's goals (quarterly default review) with the commitment-specific renewal question

Common Failure Mode

Accepting the hedged answer: "Probably not, but I've invested two years." The two-year investment is irrelevant to the forward-looking question. Sunk costs are sunk. The question is about future value: "Given the next year, is this the best use of my commitment capacity?" If the answer requires a "but" to become yes, the commitment is being sustained by rationalization, not by genuine value.

The Protocol

(1) During scheduled reviews, for each active commitment ask: "Knowing everything I know now, would I start this commitment today?" (2) If the answer is a clear yes → renew. The commitment passes on current merits. (3) If the answer is "probably not, but..." → investigate each qualifier: "But I've invested so much" → sunk cost. Not a forward-looking reason. "But it would be awkward to leave" → social cost. Real, but is it larger than the ongoing commitment cost? "But others depend on me" → investigate: do they genuinely depend on you, or could they adapt? (4) After investigating qualifiers: if no forward-looking reason survives → begin exit process (Exit criteria must be state+date pairs (observable condition + time horizon) — feelings in the moment are what the criteria exist to override exit criteria). (5) If a forward-looking reason survives → renew, but document the specific reason. At the next review, check if that reason still holds.