0 a necessary condition without which something is not possible: --
1 something that must be done or achieved before anything else is done or achieved: --
That is the sine qua non of this phenomenon in general: ducats are used in jewelry only when people have enough to show off.
In this latter period, the art of shouting became a sine qua non for drinking in public.
However, lifestyle modification still remains the therapeutic 'sine qua non'.
It does not imply, however, that it was the sine qua non.
If individuality is a sine qua non, for ensoulment, then this property cannot be an attribute to the very early zygote or pre-embryo.
To put it another way, why was landscape a sine qua non for characterising a nation which, when all is said and done, existed already?
This duty is a sine qua non for establishing and maintaining a fiduciary relationship between professionals and patients.
If paradox is truly the sine qua non of key aspects of performance, we must perforce engage with such textual convolutions via a paradoxology.
