(adj): vs. sound) -- (not sound financially
(adj): not based on fact or investigation
(adj): vs. empirical), theoretic -- (concerned primarily with theories or hypotheses rather than practical considerations
(adj): prenominal) -- (showing curiosity
(adj): vs. incurious) -- (eager to investigate and learn or learn more (sometimes about others' concerns)
Speculative fiction and counterfactual fiction are sometimes used as alternatives to science fiction and sci-fi.