The improvement of the telescope was justly regarded as a sine qua non for the advancement of astronomical knowledge.
This process is called conceptual synthesis, the possibility of which is a sine qua non for the exchange of information by speech and writing.
The conferences were opened at the close of July in the camp of the grand vizier, who was pressing Belgrade hard and demanded the surrender of the city as a sine qua non.
The commissioners feared that, so long as Greek was a sine qua non at the universities, these schools would be cut off from direct connexion with the universities, while the universities would in some degree lose their control over a portion of the higher culture of the nation.
This view has the merit of giving the book a practical religious aim - a sine qua non to any theory of an early Christian writing.