I'm sitting quietly in my green writing chair, working on a picture I've been painting.
He walks over and looks at it.
I say nothing.
Maybe he'll go away. 
Then he looks at me.
I still say nothing.
Really, maybe he'll go away. 
Then he looks in my hand.
I say nothing (brilliantly,  by this point, I might add -) 
Really, doesn't he have somewhere to go? 
"Is that your new Sharpie?"
"Yes!" I smile and admire (again) the handy chiseled tip that helps me make funky artsy letters.
"Well......that's NOT a Sharpie," he says, and then spins on his heels and walks, clearly away satisfied his message has been fully conveyed. 
Because I don't bother contradicting him with reality (example: the words "Sharpie" on the pen),  I win the argument  and the universe rewards with more time (alone) to draw and to write, happily and quietly.