As a Latin term, it occurs in the work of Boethius and originated in Aristotelian expressions. In Classical Latin, the form uses the word condicio (from the verb condico, condicere, to agree upon), but in later Latin the phrase is … 展开

In medicine, the term sine qua non (in contrast with pathognomonic) is often used in regard to any sign, symptom, or finding whose absence would very likely mean absence of the target disease or condition. The test for such a sign, symptom, or finding would … 展开

• If and only if
• Proximate cause
• Causation
• Four causes
• Raison d'être
• List of Latin phrases 展开

US President Andrew Jackson once gave a toast on the occasion of his receiving an honorary doctorate from Harvard University, responding to his listeners, "E pluribus unum, … 展开

In legal matters, "but-for", "sine qua non", causa sine qua non, or "cause-in-fact" causation, or condicio sine qua non, is a circumstance in which a certain act is a material cause of a certain injury or wrongdoing, without which the injury would not have occurred. It is … 展开