Okay, so I wrote the post below and snarked about Boris, and then walked into the living room.
And found Higgins, carefully cleaning Boris - because it's a dirty job, but somebody has to do it. And I said (because I talk to my cats) "Carefull Higgins, you are going to puke up a nasty gray hairball!"
At the words: "Nasty gray hairball," Boris raised his head and looked at me - "What?"
Who says cats don't acknowledge their names?