'reasonably decide' is a correct and usable phrase in written English.
It is an idiom that means to make an informed decision without being too lenient or too strict. For example, "We need to reasonably decide how I'm going to allocate my resources for this project."
However, migraine patients could reasonably decide not to use pharmacological anti-migraine preventive therapies for different reasons such as negative attitudes towards medication in general and fear of medication side-effects [15, 16].
He could reasonably decide the time to pull the rabbit from the hat has passed, but that is unlikely.
And so even if it were true that you could reasonably decide to commit suicide if only you were thinking clearly, nobody does think clearly.
We think that a board could reasonably decide to defer action until the law is clarified, particularly if the company's equity plans are not being brought to shareholders.
Or they might reasonably decide against spending money on an election that will probably be marked by low turnout and an inadequate consideration of the candidates.
There are tens of millions of people living in that region who might reasonably decide that the only future for them and their families lies in Europe.
West, a professional player, led the club ace, reasonably deciding it was unlikely South had the club king.
But the commissioners reasonably decided that was for another time, when the public could give it more consideration.
They maintain that his original trial lawyer reasonably decided not to get the more primitive DNA tests that were available in 1994.
The Bush administration reasonably decided that it would not seek to micromanage Mideast peace talks the way the Clinton administration did.
With compound interest accumulating on the rental income from their Manhattan property empire, the Astors, wishing to better themselves, very reasonably decided that "America is not a fit place for a gentleman to live".
