{"$schema":"http://json-schema.org/draft-07/schema#","$id":"http://jsonlogic.com/schemas/operators/logic/notnot.json","title":"!!","description":"Double negation, or “cast to a boolean.” Takes a single argument.","type":"object","additionalProperties":false,"required":["!!"],"properties":{"!!":{"$ref":"http://jsonlogic.com/schemas/common/unary-arg.json"}},"examples":[{"!!":[[]]},{"!!":["0"]}]}