Let's take it to a new thread thenalice wrote: ↑Wed Jun 17, 2020 11:41 amStrict adherence to "plausibility" and "realism" can be overly limiting, and can lead to nervous paranoia, but you have to be careful not to go too far in the other direction, otherwise you'll end up with no limitations at all. I think a maximum of one ass-pull per con-thing is sensible, or two with a lot of caution. This probably deserves its own thread.elemtilas wrote: ↑Wed Jun 17, 2020 10:53 amIf you want an Earth-like planet that doesn't have a Moon, well, you just do that! It's been a growing trend, among worldbuilders as among language inventors, that, for some strange reason, everything must be plausible and realistic. As much as Realism School fans decry Star Wars I find it a source of wonder that inhabitable planets can have three suns and huge moons and all the rest.
I think the lesson here is to put science at yóur service --- rather than to conceive your world in the service of science.
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The standard rule in SF is that you're allowed One Big Lie. Except that of course, SF works end up with a lot more ass-pulls. Foundation has galactic colonization, hyperdrives, pocket nuclear device, a science for predicting human behaviour, anti-gravity, and my personal favorites, psychic powers through advanced mathematics, psychic powers through genetic mutations and of course, my favourite SF item: atomic ashtrays. All of which are seriously questionable. We buy the stuff because they make the story work and their origin and consequences are explored. Yes, even the atomic ashtrays! (Tobacco serves as a shorthand for the state of pan-galactic trade, the technological power of the Foundation is demonstrated, rather neatly, by their use of nuclear power for everyday object.)
What do people complain about Foundation? Well, OK, psychohistory, but arguably that's not a bug, it's a feature. Psychohistory gets people engaged enough to argue about it so that counts as a success.
The most jarring things are the sexism. Or little details, like oil and coil-rigging after 20,000 years, or the tobacco plantations, or when they calculate hyperspace drive with slide-rules.
I'd argue these are areas where Asimov didn't quite think things through. A far-future society isn't going to have 1940's American values; they could very well be sexist, but their sexism would be different; oil and coal aren't going to be in 20,000 (it's as if we went back to mammoth hunting), the drugs will be different if you've had 20,000 years to explore a galaxy's worth of ecosphere, if we could figure out FTL technology with a slide-rule, we'd have done it.
So, to put it briefly, you can justify just about everything as long as your picture is detailed enough, the details fit the story, and you explore the consequences of the premise. Of course this amounts to the same thing as your rule: a huge ass pull entails enormous consequences, so you need to limit these.
On the other hand, we're talking about creating entire planets here. We'll never finish it anyway, so we can spend as much time as we want on any absurd detail we feel like exploring.
Oh, and I guess implausibility can be freely ignored when it serves the plot. Perdido Street Station is all about the grotesque and the social commentary; nobody cares that the khepri make no sense or that the garuda can't possibly fly.
For that matter, sufficiently vivid and grounded narratives makes readers forgive a lot of things. The Micmacs never built huge Maya-style pyramids in Maine, but the description of daily-life in rural Maine is so vivid that I'm still scared when I get there.
Implausibility is also, at heart, a requirement in SF and fantasy. To use Foundation as an example again, if anything, it's rather lacking in magitech. ("20,000 years of technological civilization and all I got is that lousy ashtray").
In fact the need to balance implausibility and realism is at the heart of good speculative fictions. Ask yourself "What if there had been dragons on medieval battlefields?" and you get aSoIaF. Ask yourself "What if the beings of Germanic mythology had actually existed alongside the Christian god?" and you get the Silmarilion, or "And what would be the place of men in this, and what would it be like, fighting Satan right here on Earth?" and you get LOTR.