interesting thread I agree if we change the phrase "hard SF" to "most SF". Hard SF (WORDS MEAN THINGS!) refers to SF that does not contradict any laws of physics as they're known today. FTP, force fields, and psionics do not occur in hard SF / if they occur the SF is not hard.https://twitter.com/MishaBurnett/status/1121124129757904897 …
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3/ It obeys conservation of energy laws and a few other constraints. On the other hand, it is not compatible with a few things that we think we know about physics. Now, I've got reasons for that, and they'll be explained in 3 & 4 ... but it still is dodgy, and may disqualify
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4/ Misha and I are on the same page here (motte and bailey ! )https://twitter.com/drethelin/status/1121529563539017733 …
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5/ see previous but if so ONLY one ; two is right out https://twitter.com/DeanBradleySFF/status/1121529655897526272 …
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6/ "worth it" you've got the sign bit flipped there, bucko! https://twitter.com/SteveSkojec/status/1121529470072963072 …
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7/ Great literature, but not hard SF. FTL is right out. Psionics / overview of history: again, right out. Force fields? Third strike. Finally, the calories for a worm to push through sand are really really hard to justify. https://twitter.com/SpaceAgeCowboy/status/1121529437756055553 …
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8/ On the one hand, I don't think of the Expanse as hard SF ... but on the other, nothing in book 1 is incompatible w physics as we know it (fusion drives, nanotech ... and that's it, right?)https://twitter.com/Zacnaloen/status/1121529321842270209 …
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9/ I'm happy to lump Dune into the mainstream of SF. I don't feel the need to pigeon hole every particular piece, like a 19 year old declaring that this band is "shoe gaze", but that other one is "neo post-punk" or whatever. https://twitter.com/SpaceAgeCowboy/status/1121530426185662464 …
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I like your definition but I’m also prepared to accept “everything is physics compatible except for one fully-realized point of departure”
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Which is why "hard" in SF is not an exact term. There's a range of hard and soft. Hence, the Mohs Scale of SF Hardness: http://www.superversivesf.com/2017/03/23/the-mohs-scale-of-sf-hardness/ …
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But it is open-sourced! Er... it will be open-sourced.
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