It is an absolute "sine qua non". Respect of signals is an imperative,"condition sine qua non" of safety. Objection to the state and its institutions is a "sine qua non" of anarchism. Warmth is not the sine qua non of community formation but guards against instrumentalist relationships. A sign or symptom with very high sensitivity is often termed "sine qua non". Philosophers do not perform experiments and formulate scientific theories "qua" philosophers. Socrates qua person is essentially a person. He later appeared in the "Vanishing Son" action series as Fu Qua Johnson. Some hymns are prayer qua prayer, desiring harmony and peace. In desperation and upon prompting by Mary Sinclair, Dirk Struan turned to Jin Qua. However, this method "qua" method was known long before Horner. TD rush on third down by Qua Searcy, with 30 seconds left in the game.