Scientia potentia est phrase ""sapientia est potentia"" is often translated as "wisdom is power". The earliest documented occurrence of the phrase "Knowledge is power" is from Imam Ali (599-661 CE), as recorded in the tenth-century book Nahj Al-Balagha (originally in Arabic). He said: Another account of this concept is found in the Shahnameh by the Persian poet Ferdowsi (940–1020 CE) who wrote: "Capable is he who is wise" (in Persian: توانا بود هر که دانا بود). This hemistich is translated to English as "knowledge is power" or "One who has wisdom is powerful". A proverb in practically the same wording is found in
Non est factum Non est factum Non est factum (Latin for "it is not [my] deed") is a defence in contract law that allows a signing party to escape performance of an agreement "which is fundamentally different from what he or she intended to execute or sign." A claim of "non est factum" means that the signature on the contract was signed by mistake, without knowledge of its meaning. A successful plea would make the contract void "ab initio". According to "Saunders v Anglia Building Society" [1971], applied in "Petelin v Cullen" [1975], the strict requirements necessary for a successful plea can are