The phrase "failing to differentiate between" is correct and usable in written English.
You can use it when you want to describe a situation in which someone is not recognizing a distinction or difference between two things. For example, "The administrators were criticized for failing to differentiate between students' academic and personal issues."
In both Vietnam and the Dominican Republic, Kennedy criticized the Johnson Administration for failing to differentiate between Communists and non-Communist nationalists.
Durbin faults Rauner for not recognizing his own inexperience in politics and failing to differentiate between success in governing and success in the business world.
On that occasion, a near moral panic ensued, with much of the media outcry surrounding the tragic events failing to differentiate between the relative safety of ecstasy/MDMA, and its potentially much more dangerous imitators.
They accuse the DEA of cherry-picking data and misrepresenting kratom's potential for harm, while failing to differentiate between natural forms of the herb and the legitimately concerning "gas station" kratom products, which may be mislabeled or contain unknown adulterants.
Speaking from the White House, Obama accused Russian President Vladimir Putin of failing to differentiate between Islamic State extremists and moderate groups who oppose the regime of Syrian President Bashar Assad.
21 22 The evidence of pelvic width as a risk factor is limited to level V evidence, 16 17 with the authors failing to differentiate between the pelvic, hip or greater trochanter width.
Something is deeply wrong here.Thomas Misa Minneapolis, Minnesota For a publication famous for the sharpness of its arguments, you disappoint me in failing to differentiate, not for the first time, between torture and interrogation.
Nick Clegg has faced criticism for failing to differentiate the Lib Dems from the Tories.
In both cases, we are failing to differentiate and live our lives on our own terms.
As adults, we self-parent by maintaining these old attitudes and failing to differentiate from destructive early influences.
Codominant loci failing to differentiate among hetero- and homozygotes were regarded as not interpretable.
