I am not at all certain that this is being done.
I'm obviously not certain that this scenario is correct.
To be quite certain that this «surgical operation» is justified.
I was certain that this paradoxical interaction was the key.
You must feel certain that this trade was problematic.
It is important to be certain that this object is the trustworthy source.
Therefore I am not quite certain that this is a good idea.
Ainsi, je ne suis pas vraiment certain que ce soit une bonne idée.
I am not certain that this last circumstance is necessarily negative.
Je ne suis pas certain que cette dernière condition soit automatiquement négative.
It is certain that this girl was forced to marry him.
C'est certain que cette fille a été forcée de l'épouser.
It is therefore certain that this event violated the law.
C'est donc certain que cet événement a contrevenu à la loi.
It is certain that this hack has made Lille citizens smiling.
Il est certain que ce hack a du faire sourire un maximum de monde.
I am not certain that this camera was imported into France.
Je ne suis pas certain que cet appareil ait été importé en France.
It is certain that this Network includes very diverse institutions.
Il est certain que ce Réseau comprend des Institutions très diverses.