When another man might have snorted at this pronouncement, Snape merely gave a wry smile. If Snape had aged, his wits had not decayed in the slightest. If anything, he'd become more careful than he'd been previously. He brought the tips of his fingers together before him and examined them in a way, he realized too late, that Dumbledore had once done. This displeased him, but he maintainted the gesture.
Over the tips of his fingers, he gazed at Malcolm, sure to hold his eye. "Baddock, I implore you to believe me when I tell you that you haven't a clue what you're talking about, and I'm damn sorry to admit it, as sharp as you are. You're correct when you say that my business with Trimble is not yours, but I doubt you could imagine what I have to discuss with him."