The phrase "clarifying whether or not" is correct and usable in written English.
You can use it when you need to explain to the reader that you are looking to determine the truth of an issue. For example: "After questioning the witness, the investigator began clarifying whether or not the suspect had been at the scene of the crime."
It contributes to current discussions within the field of humanitarian healthcare aimed at clarifying whether or not and how best to respond to palliative care needs in humanitarian crises.
He said people joining the A40 were guided by notices saying Games Lanes were in operation, but there were no digital signs clarifying whether or not they were activated until drivers reached Marylebone Road.
After a brief phone conversation clarifying whether or not I was serious, he agreed to meet outside a nearby hotel.
Again, I think the critical issue is clarifying whether or not the trip is something that feels right for both of you at this time.
Here, we aimed at clarifying whether or not knocking down the C. elegans Indy homolog CeNAC2 increases life span similar to the studies in D. melanogaster.
Studies should be aimed at clarifying whether or not they are exclusively found in the human brain, since similar clear-cut subregions, endowed with the described neurochemical properties, have not been reported in other species.
The judge in the case, Charles P. Sifton, was abrupt with prosecutors, telling them they should be prepared to clarify "whether or not this is a vindictive prosecution".
Beamish said: "The SNP government must now clarify whether or not they will respect the will of parliament and introduce an outright ban on fracking.
Although there exist different formulations incorporating limited kinematical hardening in the literature, it is still not conclusively clarified, whether or not these are applicable to generally-nonlinear hardening laws as well.
He must now further clarify whether or not he or his family were benefiting directly or indirectly in 2013 when he was lobbying to prevent EU measures to better regulate trusts as a way to clamp down on tax avoidance.
