La seule chose qui compte vraiment est si oui ou non votre professeur pense que votre exposé est assez bon.
- The only thing that matters is whether or not your teacher thinks your report is good enough.
La seule chose qui importe est si oui ou non tu peux faire le boulot.
- The only thing that matters is whether or not you can do the job.
They've only been married a very few weeks, whether or not.
... And you have at least some power over whether or not your ...
... and standards, and the particular one that you've identified, which is whether or not ...