Some info about LATIN
Category
QUOTES AND PHRASES
Sine qua non is an indispensable and essential action, condition, or ingredient. It was originally a Latin legal term for " without which it could not be", "but for...", or "without which nothing." Also, "sine qua non causation" is the formal terminology for "but-for causation."
Wikipedia contributors, "Condicio sine qua non," Wikipedia, The Free Encyclopedia,
ABOUT THE LATIN LANGUAGE