Oh, he knows

There is no question in my mind that Oliver knows exactly what happens on the potty.  If there had been, it would have been answered this morning when I said, to no one in particular while walking through the kitchen, "Mommy needs to go potty before we leave for school."  Oliver walked over to the bathroom, opened the door, lifted the lid on the toilet, and motioned for me to sit down.  Then stood there and waited for me.  (I would've made him leave, but, well, I stand right to him when he sits on the potty.)