This is the whole course in one sitting. Every idea you’ve met — the paradox that destroying your own options can strengthen you, the backward induction a rival uses to look ahead at what you’ll actually do, the credibility test that separates a real commitment from cheap talk, the toolkit that manufactures belief (contracts, burned bridges, reputation, delegation, automaticity), the split between threats and promises and between deterrence and compellence, the brinkmanship that leaves something to chance, the balance of terror that makes mutual vulnerability stabilising, and the failure modes where a burned bridge burns you — shows up here as questions. Hold the through-line in your head: a commitment works by changing what a rival believes you will do, so it only works when it is credible, and only helps when the influence it buys is worth the freedom it costs. Take a breath. There is no going back once you commit — a fitting test for a course about the choices no one can unmake.
How this exam works
This is a real exam, not a practice quiz. Questions appear one at a time. Once you submit an answer it is locked for good — there is no going back, no retry, and no restart. Your score stays hidden until the very end. A few questions ask you to select all that apply (read those carefully — partial credit is not a thing here). You need 70% to pass. Ready when you are.
What is the central paradox of a credible commitment?
Select an answer to continue.
Big picture
Credible commitment & deterrence, in one picture
- Credible commitment & deterrence
- The paradox
- Deliberately destroying your own options can strengthen you, because it changes what a rival expects you to do - Cortés burns the ships so retreat is impossible and the enemy reckons differently
- The mechanism
- A rival uses backward induction, looking ahead to what you will actually do; your soft option (yield) is what invites the challenge, so removing it rewires their best response and you win without fighting
- Credibility
- A commitment only works if visible and believed; the credibility test asks whether following through is your best move when the moment comes, and you manufacture belief with contracts, burned options, reputation, delegation and automaticity
- Threats & promises
- Threats punish and promises reward, and both need credibility (a promise faces the temptation to renege); deterrence stops an action while compellence forces one, and compellence is harder because it demands visible, deadlined, face-losing compliance
- Brinkmanship
- When a threat is too big to be believed, deliberately raise a shared risk of catastrophe neither side fully controls - the threat that leaves something to chance - as in the game of chicken and the Cuban Missile Crisis
- Balance of terror
- Mutual assured destruction deters a first strike when both keep a survivable second-strike capability, and paradoxically mutual vulnerability is stabilising while a perfect defence or disarming first strike creates dangerous use-it-or-lose-it incentives
- Where it backfires
- A burned bridge can burn you: bluffs get called, commitment traps and sunk-cost escalation lock you into disaster, doomsday devices fire by accident, and rigid commitments become cages when the world changes - so commit only when the influence beats the lost flexibility
- The paradox
Key takeaways
You now hold the whole model. The paradox: destroying your own options can make you stronger, because a commitment changes what a rival expects — it works through their backward induction, not your strength, so it must be visible and credible. The credibility test asks whether following through is your best move when the moment comes; cheap talk fails it, and you manufacture belief with contracts and penalties, burning the option, reputation, delegation, and automaticity. Commitments come as threats (sticks) and promises (carrots) — both need credibility, since a promise invites the temptation to renege. Deterrence stops an action (keep the status quo); compellence forces one (change it), and is harder because it demands visible, deadlined, face-losing compliance. When a threat is too big to believe, brinkmanship substitutes a risk of catastrophe you keep ratcheting — “the threat that leaves something to chance,” from chicken to the Cuban Missile Crisis. At the extreme, mutual assured destruction deters a first strike so long as both keep a survivable second-strike capability — and the paradox of vulnerability means mutual exposure is stabilising while perfect defences and disarming weapons destabilise. Finally, stay honest about where a burned bridge burns you: bluffs get called, the commitment trap and sunk-cost escalation lock you into disasters, doomsday devices fire by accident, and rigid commitments cage you when the world changes. Commit only when the influence gained beats the flexibility lost, the threat genuinely bites, and the world can see it.