[T]he two commended rules by him [Aristotle] ſet down, whereby the axioms of Sciences are precepted to be made conuertible, and which the latter men haue not without elegancy ſurnamed; the one the rule of truth, becauſe it preuenteth deceipt; the other the rule of prudence, becauſe it freeth election, are the ſame thing in ſpeculation and affirmation, which we now obſerue.
Source: wiktionary