So I have this cat, Loki, right? There are pics of him when I got him years back dressed in a fabulous boa. Not only does he play fetch, presumably because he studied how pets interact with owners, he also doesn't understand the fundamentals of what it is to be a cat.

Here are some examples: He plays fetch like a dog. He didn't understand hissing wasn't a form of greeting [took weeks before he figured that out]. He doesn't like salmon and prefers a cat food with a garden sauce. He drinks soap water from the sink.
And now, just now, he indulged in eating bites of a peanut butter and jelly sandwich. I had to hold it, if I tore pieces off to give him he literally raised one eyebrow Spock style.