conventional wisdom

Definition from Wiktionary, a free dictionary

[edit] English

[edit] Noun

Wikipedia

conventional wisdom (plural conventional wisdoms)

1. A belief or set of beliefs that is widely accepted, especially one which may be questionable on close examination.
   • 1971, "Week's Watch," Time, 17 May,

     So many Americans accept "zero population growth" as a new canon of conventional wisdom that it comes as a surprise to hear the notion disputed.