It stands for interstate. But it's the question, or the nature of such a question that I've been witness to for the past month as my children have been home from school. One child asks questions more.
My other child observes more of what I do, as in what my body is language-ing. Or how I might nag him (or her) to please put down the screen while I proceed to sit there and type email responses. Or how I lose my temper while baking low-carb meatloaf.
To describe my state while painting as speechless is inadequate. I've had conversations, supposedly, with my wife on my cell phone while painting that I barely remember. I mean, I do make noises, words even. But mostly, I experience painting as an ungrammatical stretch of grunts. This is what those who observe me have reported, I don't remember.