Examples of using Difficult to be sure in English and their translations into French
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                        Colloquial
                    
Difficult to be sure, isn't it?
It's always difficult to be sure.
With two square metres of plane, it will be  difficult to be sure..
It is  difficult to be sure.
Without telepathic powers, it is difficult to be sure.
This makes it difficult to be sure of what you are  buying.
Indeed, it's usually very difficult to be sure.
It is  always difficult to be sure about rumours like.
Of course all are  labeled conspiracy theories or cult, and actually with all the propaganda andlies it is  difficult to be sure of anything.
Sometimes it is  difficult to be sure.
It's difficult to be sure of its quality.
But it's always so difficult to be sure.
So it is  difficult to be sure that he or she is not infected.
Perhaps, but it is  difficult to be sure.
It is  difficult to be sure about the validity of IPR claims.
But it's always so difficult to be sure.
It is  difficult to be sure whether a data set qualifies as non-identifiable.
The answer was  that it was difficult to be sure in some instances.
It's also difficult to be sure that the effect of all potential confounders has been  removed.
Other systems tend to  hide details,which makes it difficult to be sure that certain aspects are  covered.