The phrase "able to be sure" is correct and usable in written English.
It can be used when expressing the capability or capacity to have certainty about something.
Example: "After reviewing all the evidence, I am finally able to be sure of my decision."
Alternatives: "capable of being certain" or "able to confirm".
For the first time we will be able to be sure which wolf is howling to us and track individuals across their territories using just their howls.
There are no other disposal wells in operation in the area, Mr. Ware said, but four are under development "and would not come online until we're able to be sure".
Doctors must be able to be sure that a pregnant women does not have an ectopic pregnancy, in which the fetus is lodged in a fallopian tube rather than the uterus, and they must be trained to use Mifeprex.
As we can't wind the tape of history back and rerun it, we'll never be able to be sure that the story Feinberg and Mallatt tell is right in all its details, but their neuroevolutionary approach is the best we will have if we are to respect the power of our own human consciousness and also to locate it within a biological framework.
If the trade union movement is to be induced to take a new and deeper interest in socialism, which is a precondition for mass support and social change, trade union members must be able to be sure that the policies that go through party conference will actually be in the manifesto and will be implemented by accountable parliamentary leaders.
But in a statement yesterday, the Suffolk County district attorney, Thomas Spota, whose office prosecuted Mr. LaValle's case, said juries needed to be able to be sure "that in the event of a deadlock, the defendant whom they found guilty of first-degree murder would be sentenced to life in prison without parole".
You were taught that you had to be able to run, you had to be sure that nobody caught you.
It is one thing to be able to generalize so, quite another to be sure one has succeeded.
You want the pieces to be able to fit in your hand to be sure they are completely kneaded.
Flight crew schedulers must be able to communicate with flight crews to be sure all regulations are met and all flights have adequate crew members.
That is something I have thought about in every phase here at Dortmund and decided in the last few weeks, days, that I was no longer able to be absolutely sure about that.
