This morning Jonathan asked for a slice of green pepper, which I gave him. One bite later, he informed me that he didn't like it, then walked away. A moment later I overheard the following conversation:
J: Thomas, do you want this? T: No, I don't like that. J: But Thomas, it's good! It's a vegetable!
I think his technique needs a bit of work, as Thomas refused the vegetable and Jonathan returned it to the kitchen. :)