Under the category of “old news”, there was a long-distance argument back in 2013 between Noam Chomsky and Slavoj Žižek on the significance (or lack thereof) of each other’s work.
It began with Chomsky describing Žižek’s work as empty “posturing”. Asked about the comments during a Q&A session for an unrelated presentation, Žižek responded (sort of). Žižek’s initial “response” seemed rather stupid and full of baseless attacks. So, Chomsky responded substantively, calling Žižek’s positions “fantasy”. At that point, Žižek finally prepared a substantive written response.
The winner of this “debate”? Žižek, clearly. The early comments from Žižek were gibberish, but also possibly misquoted and certainly “improvised” as he later acknowledged. But his final response points out some serious flaws in Chomsky’s “philosophy” and some clear hypocrisies. Chomsky never responded thereafter, as best as can be seen.
For worthy summaries of the debate, and how it really represents a generic one between analytic philosophy (Chomsky) and continental philosophy (Žižek), see The Guardian and The Partially Examined Life. This is much like the distinction between Isaac Newton’s (analytic) and Johann Wolfgang von Goethe’s (continental) views on color.