Justified or authorized by facts or circumstances; something that is guaranteed or promised to work as described.
From 'warrant' (from Old French 'warant,' a pledge or guarantee). Evolved from legal and commercial contexts where something was 'warranted' or guaranteed; now used generally to mean justified or deserved.
Warranties are capitalism's promise that things will work—but the word 'warrant' originally meant a written authorization from a monarch. It's beautiful that buying a toaster creates the same legal relationship (a written guarantee) that subjects once had with kings.
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