The phrase "a questionable subject" is correct and usable in written English.
It can be used when discussing a topic that may be controversial, sensitive, or open to doubt.
Example: "The article delves into a questionable subject that has sparked much debate among scholars."
Alternatives: "a controversial topic" or "a debatable issue".
Viewing the self as a "questionable-subject-in-process"—a subject who is responsive to the encroachments of semiotic material into conscious life and who is therefore without a fixed or unitary identity and valorizing the dissident potential of this decentered subjectivity, Kristeva seeks to neutralize the fear of the inchoate feminine that, in her view, underwrites misogyny.
Officials at a Mobile, Alabama middle school have disciplined a teacher for giving students a quiz containing highly questionable subject matter that parents are calling "racist" and "offensive".
This would-be Coen brothers caper doesn't have enough originality to merit rallying behind such questionable subject matter.
After Parliament rejected a request to base troops there for entry by land into northern Iraq, officials said the use of air bases and airspace would also be subject to a vote, a questionable prospect.
For example, Kristeva's questionable-subject-in-process seems to enshrine and endorse the very gender dichotomy that causes women so much grief.
This is a questionable assumption as it may not reflect the perception of the subjects towards the stimuli.
Thus, a questionable interpretation of data from patients with CKD and the subsequent extrapolation to healthy subjects converted a hypothesis into nutritional recommendations for the prevention of osteoporosis.
Our pious faith is subject to recurrent knocks, as the sacred artefacts before which we conduct our vigils turn out to have a questionable contact with the artists.
It is a questionable decision.
That is a questionable prospect.
The Colorados are a questionable lot.
