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Discover LudwigThe phrase "sure of whether" is correct and usable in written English
It can be used when expressing uncertainty or indecision about a particular situation or choice.
Example: "I am not sure of whether I should accept the job offer or continue my search."
Alternatives: "uncertain about whether" or "doubtful of whether"
Exact(4)
Likewise, those who were not sure of whether they had tophi exhibited lower MCS (p < 0.01), PCS (p < 0.001), SF-6D (p < 0.001), and activity impairment (p < 0.01) than those with no tophi.
Due to the study design it may be difficult to be sure of whether the measured personality traits are actual signs of neuroticism or merely represent symptoms of posttraumatic stress.
In the rural area, patients were hesitant/not sure of whether they would use quality information in their pharmacy decision-making/pharmacy switch because of the good credibility of available pharmacies, limited pharmacy choices in the area, and personal relationships with the owners of the pharmacies they used (table 1).
Prairie dogs will do a sort of "greeting" to make sure of whether another prairie dog is friend or enemy.
Similar(55)
What nobody could be sure of was whether this talent would stay in tight bud or whether it would burst into glorious flower.
And what nobody can be sure of is whether it ever will.
What they are not sure of is whether their newfound passion is instinctive or a byproduct of dopamine.
And while there is no way to know for sure, of course, whether BP was just extraordinarily unlucky, there is much evidence that people in general are not good at estimating the true chances of rare events, especially when human error may be involved.
One thing I'm not sure of is whether Hope is suggesting that Chastain should be more supportive in her commentary--which I would take issue with; my primary complaint about Chastain is that she spends more time fawning over the players than saying anything insightful--or that she should seek out a different role entirely and promote the women's game outside of television.
What I'm not sure of is whether they are acting out of fear or out of perceived opportunity.
What I am not yet sure of is whether he will be sufficiently widely celebrated.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com