I read this as...
Samsung : "Mummy Appy's not sharing toys with me, and he's not even playing with them!"
Apple : "Am to! Make him stop telling lies!"
Unfortunately Koh has to respond as a judge rather than a frustrated parent so is making them proove their claimed use/none use. I would far prefer the frustrated parent approach of forcing them to share, or taking the toys (patents) off both them. I don't imagine their is any legal methodology for that of course but it would be much more satisfying.