material defect
(4) Material defect The term “material defect” means a defect in any item, whether tangible or intangible, or in the provision of a service, that substantially prevents the item or service from operating or functioning as designed or according to its specifications. The term “material defect” does not include a defect that— (A) has an insignificant or de minimis effect on the operation or functioning of an item or computer program; (B) affects only a component of an item or program that, as a whole, substantially operates or functions as designed; or (C) has an insignificant or de minimis effect on the efficacy of the service provided.