> I think the critical factor that makes sci-fi hard isn't known physics, exactly, but early on establishing a known set of rules and letting them play out as they will
No that's just competent writing. Hard sci-fi is very much about real science.
No that's just competent writing. Hard sci-fi is very much about real science.
"Hell is the Absence of God" by Ted Chiang deals with a world in which god, heaven and hell are unambiguously real.
Both are definitely "hard sci fi"