Sentence examples for difficult to know this from inspiring English sources

Again, because the program is secret, it is difficult to know this with certainty.

As with so many aspects of this story it is difficult to know at this stage whether this is genuine or a parody.

Furthermore, the study by Rivers and coworkers did not specifically address the question of an optimal RBC transfusion trigger in this setting, and hence it is difficult to know whether this liberal transfusion trigger was responsible for the mortality benefit seen in the goal-directed group.

It is difficult to know whether this partial amnesia is genuine or a tactic.

It is more difficult to know how this would translate into a race for Congress.

"It's very difficult to know in this moment if he can play against Rome".

It is difficult to know where this uneasy transatlantic detente of 2008 will lead.

It is difficult to know if this is progress or not but it failed to mobilise the electorate.

It's difficult to know why this hauntingly beautiful music remains so little known to all but a small circle of admirers.

"It's difficult to know how this will play out," he said, "but most of the most important discoveries in medicine are made serendipitously.

It is very difficult to know at this moment but I am optimistic he will not be out for the rest of the season.