Laesio enormis, Latin for abnormal harm, is a legal doctrine that gives a contracting party the ability to rescind an agreement if the price of the exchange is less than a certain proportion of its actual value, for instance one half or two thirds. The principle was developed as a way to ensure that people received a just price, iustum pretium, in an exchange. It stood in opposition to the Imperial Roman view, found in the Corpus Juris Civilis, that the parties to an exchange were entitled to try to outwit one another. The source article is brief and does not say which jurisdictions apply the rule today or what fraction each uses, so those specifics remain for later depth work.
Facts
Classification
Doctrine Category Connections
In Area Of Law
Entity-backed identity for the doctrine category value this doctrine already carries as an enum fact, resolved to a doctrine entity by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The enum fact itself stays on the entity unchanged.
Sources
1. Wikipedia: Laesio enormis
a legal doctrine that gives a contracting party the ability to rescind an agreement if the price of exchange is less than a certain proportion of its actual valueView the Source Laesio enormis (Wikipedia)
In Group: Contract Unconscionability and Unfair Bargain Doctrines, gives a contracting party the ability to rescind an agreement if the price of exchange is less than a certain proportionView the Source Reader Challenges (0)
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