Look up sine qua non in Wiktionary, the free dictionary.

Sine qua non is a Latin phrase that refers to indispensable and essential action, condition, or ingredient.

Sine qua non may also refer to:

• "Sine Qua Non" (Battlestar Galactica), an episode of the sci-fi TV series Battlestar Galactica
• Sine Qua Non (wine), a California cult wine producer
• "Sinequanon", a song by Hybrid appearing on the 1999 album Wide Angle

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