Rebecca seems mostly better. I offered her a grilled cheese for lunch, and she declined, preferring toast and fruit.
A little while later she came up with this gem:
Becca: "One time when I was a baby I liked grilled cheese. But now that I'm a little girl I don't like it anymore."
Dad: "Why don't you like it anymore?"
Becca: "I liked it when I was a baby. I don't like it now. Because of evolution."
Becca sees creatures that dislike grilled cheese as further along the evolutionary chain. Interesting.