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For questions that ask if a given concept is consistent, or being used consistently, in the context of the referenced world rules. Answers should say yes or no, with supporting info. This tag should not be used with the science-based, hard-science, or science-fiction tags. Comparisons to the real world should use the science-based tag. This tag may not be used alone. This tag may not be used with the science-fiction, science-based, or hard-science tags.

3 votes

Can we build a roguelike maze?

Roguelike games consist of lots of rooms. It’s the random nature of the rooms’ connections and contents which gives it the random maze feature. So you don't have to build a massive building with no …
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3 votes

What laws, if any, would have to change to allow people with superpowers to use their powers...

In many jurisdictions, you'll have a pain with Health & Safety regulations. Employing superman to work on a construction site? You can't make much use of any of his powers because of HSE regulations. …
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0 votes

Could cord-cut be a real martial arts technique?

This may not be quite what you’re looking for, but some martial arts techniques involve hitting nerves where they’re near the surface (typically near joints). Whilst it doesn’t cause permanent damage …
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1 vote

Could large space ships land safely

I assume this is a 'colonise a world' scenario? You probably don't want to land it as one big ship, even if the ship can withstand it. If you want to permanently land such a ship and 'install' it int …
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1 vote

Could a simple hospital oxygen mask protect from aerosol poison?

As others have answered, it's physically possible. However, you should note that breathing pure O2 is toxic. I can't find clear figures for 1 bar of O2, but 0.5bar O2 causes irreversible damage in 1 …
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0 votes

What would be the consequence of a traffic light system where the users with green light pay...

Traffic flows are very complex. There are fairly simple situations in which adding an additional road can increase journey times compared to the road not existing. Any good traffic control system doe …
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2 votes

How can a kingdom keep the secret of a missing monarch from the public?

By conducting all business through musical dance numbers... Music is akin to magic (or is it a form of innate magic? the magicians are still debating), and makes us see things which aren't strictly t …
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5 votes

How can a kingdom keep the secret of a missing monarch from the public?

He's transformed into a hideous beast? Great! Now he looks seriously aggressive – almost like how warriors dress in horned helmets and furs and the like. So slap some armour round him, and make it lo …
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3 votes

How can guns be countered by melee combat without raw-ability or exceptional explanations?

I've experience with both guns (sport shooting), and swords (HEMA). As others have noted, you're going to have to bend one or more of your restrictions slightly. Lots of the answers suggest reasons …
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6 votes

How can I build a Nuclear Reactor in my backyard?

Your biggest issue with building a reactor would be that they've got a minimum output, well in excess of what you could use. You could build an RTG (https://en.wikipedia.org/wiki/Radioisotope_thermoe …
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3 votes

Viability of a robot/mecha body with jumping-stilt/Cheetah-blade-like legs?

Springs As @nosijimiki has answered, springs don’t scale well, due to physics. Also remember that as the height of something doubles, the volume (and so mass) cubes. This means the burden on springs …
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1 vote

Guns against regular people

You'll need to go for skills that'll prevent them getting into a traditional fight, rather than they typical slugging-it-out stuff you see in films. Make one of the minor powers something that has a …
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3 votes

How much medical information could we gather from a wrist-worn device?

(partial frame-challenge) If you allowed for it to interface to implanted devices, plenty more could be detected. An external device which collects blood provides a continuous source of discomfort fo …
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1 vote

A clothing material or other method to slow free-fall descent down walls

Expanding foam An aerosol of highly expanding foam, which they squirt at the ground below them as they fall. They therefore land into a column of foam which dissipates their energy as they land. The …
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