For the Trek fans who think magic and psionics are different and/or that magic doesn't belong in sci-fi: How do Q and Kevin Uxbridge fit into what would classically be considered science fiction?
It is the case of Clarke's “Any sufficiently advanced technology is indistinguishable from magic.”
My stance is that this whole magic/mystical vs psionics/scientific divide is not a division that exist in the underlying reality, it is mainly one that says something about the attitudes of the practitioners. Stat Trek, or at least good Star Trek, mostly presents the setting, even ludicrous aspects, via scientific realism, and that is the attitude of most of the main characters. Though in DS9 they start to flirt with spiritualism. Is Q a god? He (probably in jest) claims to be, but Picard rejects the notion outright. He treats Q as a powerful alien that, sure is far more advanced than humans, but not some sort of supernatural entity. It really is no different than Picard seeming akin to god to the Mintakans. Sisko has his own encounters with powerful aliens in the wormhole. And he eventually starts to have more spiritual relationship to them, he starts to treat them more like actual gods, like the Bajorans do. But I don't think this says anything about the actual objective godhood of said creatures. Q is probably way more powerful than the Wormhole Aliens, he certainly meets the technical definition of 'god.' The difference does not lie in the objective reality, it lies in the attitudes of those who experience it, and as this is fiction, in how the story is presented.
So similarly if one can manipulate the forces that objectively exist in the setting to levitate objects with their mind, they can contextualise this as mystical or scientific. And whether they do depends on the culture, traditions and the level of scientific understanding they have. But the underlying mechanics remain the same.