The phrase "deep discussion about" is correct and usable in written English.
For example, you could use it to describe a meeting between two people: "The two colleagues had a deep discussion about the upcoming project."
"We need to have a deep discussion about why that happened and how to change it," he said.
Within minutes he and Mr. Healy were in deep discussion about a postmodern, feminist and queer-theory critique of the Old Testament.
Part of the problem, she says, is that the company had not had a "deep discussion" about sustainability with the board.
Political analysts said the lack of a deep discussion about education was the result of a frenzied campaign that had been dominated by tabloid talk about scandal and the candidates' attacks on Mr. Bloomberg.
Incorporating the "Connections Contest" as part of a larger project in my AP English Literature and Composition facilitated deep discussion about the role of literature in our lives last year.
Both wear a British approximation of a Riviera look – chinos, light blazers, inoffensive shirts and soft shoes, and are in deep discussion about how best to seduce young Italian women.
We had deep discussions about inefficiencies and safety issues in transportation and mobility and brainstormed about how we could leverage the most advanced internet of things technologies to make the lives of companies with cars easier.
The texts are full of did-you-knows that will no doubt impress your gift recipients or maybe even set off deep discussions about how history's vagaries shape what we own.
But when it comes to violence, you then have to ask, "So, if Mario doesn't use a gun, is it appropriate for Mario to hit people?" And, in fact, when we were creating the game Super Smash Bros., we had very long and deep discussions about whether or not we thought it was appropriate for Mario to hit people.
In "First Light," Richard Preston's 1987 book about a group of astronomers working at Palomar Observatory in California, Gunn is depicted as a scientist who can move seamlessly from deep discussions about theoretical physics to expeditious repairs of a misbehaving telescope.
This weekend I went on the MEM Water Resources Management WRMM) trip to Asheville for some good ole' camping, hiking, deep discussions about water, and a brewery tour.
