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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.

11 votes

How to hide the fact of a global hibernation from the world after everyone wakes up?

I'm going to turn your question on its head a bit. I will ignore whether it is possible to deceive the public short-term, and instead show that someone, somewhere, will figure it out in the long-term …
cobaltduck's user avatar
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3 votes

How do I defeat a master of the elements

You don't My first thought after reading this was, how are you not already dead? As 渡し守シャロン stated in a comment, this guy is going to do you in, quickly, using your own atoms. He will pick some elem …
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2 votes

Is a Large Fish Club a Feasible weapon?

Fish as a club-like weapon? No. Just no. You already have two answers which make this clear. Fish as a weapon at all? Plausible. Perhaps you could trick them (I leave to the reader how to trick them …
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25 votes

How long would it take for a U.S. dollar bill to rot?

The real-life D.B. Cooper case gives us some indication that we could possibly extrapolate from. About eight years after the original skyjacking incident, some of the ransom money was found on the ba …
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2 votes

What would it take for N. Korea to be trusted by the world at large as an independent state?

"Uncle Al" has a long and steep climb, to be sure. It won't happen overnight. He must immediately denounce North Korean ambitions of a "Democratic Federal Republic of Korea" (reunification on the No …
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2 votes

What Earth species could be sapient?

I am going to borrow my answer entirely from one simple test: Does it seem to recognize itself in a mirror (another link)? And the results that are in so far are not many: humans, apes, dolphins, el …
cobaltduck's user avatar
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2 votes

Hard SF (not magical) Vampire

Why can a vampire change from a man-form to a bat-form? Let's draw inspiration from the mimic octopus. It is not a lion fish, a flounder, a sea snake, nor a jelly fish. But it can imitate those thi …
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3 votes

Maximum relative size of a nation's military

I think we can get a good answer by looking at the real-world situation of Israel, where every able-bodied citizen within a certain age range is required to serve for a period of time in the nation's …
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6 votes

Under the right temperature conditions, would a gallium sword be possible/useful?

Melting point is not among the first concerns when picking materials for a weapon, ductility, malleability, and brittleness are. In the case of gallium, where you run into trouble is with the brittle …
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0 votes

What is the extent of Featural Writing?

Another factor to add to your own answer is the concept of bits of information per character, also known as the entropy of information. To illustrate what that means, let's imagine slowing down a pla …
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27 votes
Accepted

Could elves revolve their ears to listen to sounds?

Go backwards just a few small steps in our evolutionary tree, and you will encounter the primate sub-order strepsirrhini, consisting of lemurs, galagos, and lorises. These are perhaps not our fierces …
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13 votes

Parrots for tone-deaf people where magic is performed through song (followup)

I think we can get some idea from Alex the Parrot. Alex could answer "Yellow" when asked "What color key?" and answer "Key" when asked "What object yellow?" each when shown an array of different obje …
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3 votes

Planetary Surface of Trees?

In order to get to the final state you mention, you are going to have to radically alter your initial state, which other answers hint at. Our planet's surface is mostly water, and your planet will al …
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20 votes

How wide can a river be?

The Amazon is up to 11 kilometers wide at certain points, and the Lena River is 14 km wide. Both are above your goal of 6.3 km. There are probably more examples, just some quick 'net searching turne …
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7 votes

Dragons and Hair

Dragons aren't reptilian, they are pterosauran. And that is not technically hair, it is pycnofibers, "hair-like filaments ... on the head and body, similar to, but not homologous ... with, mammalian …
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