Well, if he's learned anything here, it's that all sorts of worlds have different experiences, different words for things, and really who even knows what else. It's irritating to have his powers compared to magic when he's always known they're not, but some people are just bullheaded, and others define words differently, and it's looking like Gregor is leaning toward the latter (though probably a mix of both).

"Call what, our abilities in general? Just, abilities. Powers. They come from eating devil fruit, since those can modify lineage factors, but then you have to learn to make use of them. It's not always intuitive, and the better you understand the science behind your particular power, the better you're able to use it, usually," he explains, feeling equally bullheaded after how the conversation has gone so far. Oh, it's a good conversation, an interesting one, but he sticks to 'lineage factor' and insists on pointing out once again that it's based on science when he doesn't necessarily have to do either.