Kali 2.10 was having some issues going #2 the other day. I was in the bathroom, tasked with convincing her that everything would work out just fine.
Me: All you've got to do is push a bit and it will work.
Kali: No, it won't work!
Me: Yes, it will work just fine. You can do it.
Kali: No, I can't!
Me: Yes, you can.
Kali: Yes, I can't!
Me: Yes, you can.
Kali: Yes, I can't Daddy!
It's a different form of the language, but she gets her point across.