Nothing at Stake
Updated 2026-08-09
INTRODUCTION
English translation pending.
CORE DEFINITION
A problem identified in early proof-of-stake designs. When a blockchain forks, a validator can vote on both branches because voting on the losing chain costs nothing and voting on both guarantees a reward whichever chain wins. If everyone reasons this way, the network cannot converge on a single chain, and the consensus mechanism fails. The remedy is a slashing condition: validators must post a bond that is destroyed if they are shown to have signed conflicting blocks, which makes equivocation expensive. The wider lesson is that any system permitting costless double commitments will not produce loyalty at the moment of division.
SCAFFOLDING EFFECT
Reduce cognitive load
- Double-commitment check: ask whether members can back both sides of a decision at no cost. - Penalty design: attach a real loss to defection, since costless betrayal will be chosen. - Outsider view: adopt a disinterested perspective when your own stake is distorting the judgment.
Anchor fast decisions
A rational actor supports the option with the higher expected payoff. When supporting both options costs nothing and guarantees a payoff from whichever wins, that strategy dominates, and no one invests in the success of either side. Adding a penalty that is triggered by demonstrated double support removes the dominance, so the actor must choose and therefore has a reason to help the chosen option succeed. The same structure explains why advice from an uninvolved party can be clearer, since their payoff does not depend on the answer.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Proof_of_stakeverified
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