Since we know that Kanye West believes that The Life of Pablo is "one of the greatest" albums of all time (a pivot from an earlier proclamation that it sits alone as the "best" ever), it stands to reason that anyone who strays from that notion and critiques the album may catch Kanye's ire.

Enter, Bob Ezrin.

The veteran rock producer, known for working with Pink Floyd, Kiss, and plenty more, wrote about 'Ye for Lefsetz Letter. And he didn't speak too highly of him.

“Unlike other creators in his genre like Jay-Z, Tupac, Biggie or even M.C. Hammer for that matter, it’s unlikely that we’ll be quoting too many of Kanye’s songs 20 years from now,” he wrote, according to HipHopDX (the original post seems currently unavailable). "He didn’t open up new avenues of public discourse like NWA, or introduce the world to a new art form like Grandmaster Flash, or even meaningfully and memorably address social issues through his music like Marshall, Macklemore and Kendrick.”

Other critiques included that, "He’s like that flasher who interrupts a critical game by running naked across the field. Is that art???" and that his songwriting is “is sophomoric at best.”

(It should be noted, too, that Ezrin says he's yet to listen to The Life of Pablo.)

Kanye somehow caught wind of all of this -- something tells me he doesn't subscribe to Lefsetz Letter, but who knows -- and hopped on his favorite social media platform to respond.

Within the diatribe, Kanye also took a dig at Taylor Swift, with whom his longstanding and strange feud (or whatever you call it) was recently reignited.

'Ye mentioned her in a line on T.L.O.P.'s "Famous" ("For all my Southside n---as that know me best/ I feel like me and Taylor might still have sex/ Why? I made that bitch famous"), and she responded during her acceptance speech for Album of the Year at the Grammys earlier this month:

“As the first woman to win Album of the Year at the Grammys twice, I will say to all of the young women out there, there are going to be people along the way who will try to undercut your success, or take credit for your accomplishments or your fame.”

Last night, 'Ye came back, responding to the subliminal shots at him in that speech with a subliminal of his own.

Welcome, welcome.