True facts.
Funny side note! Almost right after I said no button press yet, Maggie didn't press the button, but she proved that she knows what it means.
She was sitting next to the bed meowing at me, which means she wants either up or food. So I stood up and she didn't run to her bowl - what she does for food - but she didn't stand up so I could lift her, either. I asked, "Do you want up?" Then I pressed the button.
And she stood up so I could pick her up. :D