A conversation of sorts:

Me:      What should we do today? I want to do something. Maybe we could go to the library?

Ruth:   [pointing at her diaper] Potty? Poop?

Me:      Yes, we’ll probably go potty and poop today, you’re right.

[Ruth walks over to where her toilet used to be downstairs.]

Me:      Oh, it’s upstairs now in the bathroom… your toilet.

Ruth:   [pondering for a second, then…] Book!

At least she’s making connections.