The phrase "idea of subject" is correct and usable in written English.
You can use it when you want to refer to a particular concept or topic that someone is considering. For example, "The professor shared a variety of perspectives on the idea of freedom."
No sane person likes the idea of subjecting animals to unnecessary cruelty.
The idea of subjecting the alleged mastermind of 9/11, Mohammed, to military justice has been hotly disputed from the start.
"The spies for hire may not like the idea of subjecting the intelligence process to more oversight, but they're not the ones paying the bill.
School systems should base their curriculum not on the idea of separate subjects, but on the much more fertile idea of disciplines... which makes possible a fluid and dynamic curriculum that is interdisciplinary". In December, the Rose review, the biggest inquiry into primary schooling in a generation, also recommended moving away from the idea of subjects.
Greenblatt's success came at a time when English faculties were flooded by a generalised influx of postmodern "theory", which lambasted the delusive trap of "liberal humanist" assumption and spurned the idea of subjecting literary works to aesthetic "value judgments".
But I didn't have the heart to mention it because it was already so far into the shooting and the idea of subjecting them to more hours reshooting felt unimaginable.
The idea of subjecting earned income over $113,700 to the Social Security payroll tax and making the Medicare tax more progressive – steps that would affect only the relatively affluent — is largely missing from the policy conversation.
As someone who still shudders at the thought of a sonnet I had to write — and read aloud — for a literature class in college, the idea of subjecting any of my creative work (that is, if I hadn't given up entirely after the sonnet incident) to brutal, public scrutiny at the hands of New York literati is virtually unthinkable.
Over the weekend, Harriet Harman, the acting leader of the Labour party, ruled out the idea of subjecting the winning candidate to a "break clause" allowing the party to get rid of them before the election if they were not gaining traction.
