Discussed by many people.

Used other than figuratively or idiomatically: see talk, about. (Compare discuss.) / (idiomatic, colloquial, imperative) Used to draw attention to the speaker's characterization of someone or something

Used to express enthusiastic support for the referent of that.

Indicates that the speaker does not want to discuss a particular topic.

What you said is so wrong it reveals you lack basic understanding of the subject or relevant experience.