Maybe he meant mute as in ineffable?
But some of this sort of crossing up of word choice seems like overly fussy tidiness. I occasionally will use the a homonym when I'm writing fast. It isn't that I don't know the difference. It just happens when I'm more intent on what I want to say than how I'm saying it. I don't like it. I fix it when I notice it. But .. meh.

But some of this sort of crossing up of word choice seems like overly fussy tidiness. I occasionally will use the a homonym when I'm writing fast. It isn't that I don't know the difference. It just happens when I'm more intent on what I want to say than how I'm saying it. I don't like it. I fix it when I notice it. But .. meh.