Search found 264 matches

by Meteoric
Fri Mar 17, 2017 2:34 am UTC
Forum: Mathematics
Topic: Elementary probability
Replies: 5
Views: 401

Re: Elementary probability

That depends what you mean by "reasonably certain". First, a simpler question: how many letters would you have to send out to expect 100 replies on average? Second, in that scenario, what's the chance of getting less than 100? And how many responses are you "reasonably certain" y...
by Meteoric
Mon Mar 13, 2017 5:29 pm UTC
Forum: Science
Topic: Free Will
Replies: 55
Views: 1318

Re: Free Will

I dont mean to draw a comparison between "free will" and randomness. Only that there certainly cant be free will in a deterministic, non-random universe. Why not, though? If by "free will" you mean that something outside causality should reach in, override your history/knowledge...
by Meteoric
Mon Feb 27, 2017 6:00 am UTC
Forum: Mathematics
Topic: WoW: A Strange Game. The only way to win is not to play.
Replies: 7
Views: 646

Re: WoW: A Strange Game. The only way to win is not to play.

I think that would have limited success in the general case. Some builds have strategies that very quickly go from optimal to terrible if you deviate slightly, and I think evolutionary algorithms are bad at finding such optima? I have only the most pop-sci-level understanding of evolutionary algorit...
by Meteoric
Sun Feb 26, 2017 9:33 pm UTC
Forum: Mathematics
Topic: WoW: A Strange Game. The only way to win is not to play.
Replies: 7
Views: 646

Re: WoW: A Strange Game. The only way to win is not to play.

Priority lists are usually arrived at by taking a few initial guesses, and simming a lot of permutations. I suppose you could try to automatically generate all possible permutations, but this sounds inefficient.
by Meteoric
Sat Feb 11, 2017 7:48 pm UTC
Forum: Mathematics
Topic: "There is an Exception to every rule"
Replies: 32
Views: 2962

Re: "There is an Exception to every rule"

The difference being a multiple of p would be denoted p|(a^p-a), though.
by Meteoric
Sun Oct 09, 2016 6:19 pm UTC
Forum: Science
Topic: Question about the law of entropy
Replies: 4
Views: 916

Re: Question about the law of entropy

No, since every process by which we might do that obeys the laws of thermodynamics. Computers don't get a free pass.

It's possible to imagine futures which are actually lower-entropy than the current universe. Such futures are impossible.
by Meteoric
Tue Sep 06, 2016 7:21 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 233
Views: 10135

Re: 2600 km in 1/30 second.

What is it that we're moving? A single electron won't do much of anything interesting, but something person-sized or larger... I imagine it would look something like a 2600km line charge made out of nukes, with an especially large nuke at the end when all of that kinetic energy discharges into the s...
by Meteoric
Thu Aug 11, 2016 6:40 pm UTC
Forum: Mathematics
Topic: N digit sequence within π
Replies: 12
Views: 1466

Re: N digit sequence within π

At the very least the normality of π is unknown. If true, it would entail that any finite sequence of n digits in base b has a probability b^-n of occurring at every place in the number, which would entail that a chosen sequence occurs at least once almost surely somewhere in π. I'm not sure in wha...
by Meteoric
Wed Aug 03, 2016 4:35 pm UTC
Forum: Science
Topic: sound earthquake
Replies: 7
Views: 1283

Re: sound earthquake

I don't think it is possible to create a sound wave in air strong enough to cause a magnitude 4 earthquake (smaller than 4 doesn't count in my mind) when transferred into the ground. The maximum intensity sound in air at standard pressure isn't very high. But you could presumably create the sound i...
by Meteoric
Fri Jul 22, 2016 5:55 am UTC
Forum: Mathematics
Topic: The liar paradox as a basis for kantian metaphysics
Replies: 11
Views: 2096

Re: The liar paradox as a basis for kantian metaphysics

That's still self-reference, you've just hidden it better.

Sentence A says "B is false". But that just means ""C is false" is false", which in turn is """A is false" is false" is false".
by Meteoric
Mon Jul 11, 2016 2:17 am UTC
Forum: Mathematics
Topic: Trisecting an angle
Replies: 63
Views: 7362

Re: Trisecting an angle

I'm not sure I understand the distinction you're making? If I had a way to construct an angle that happens to be 1/3 of another angle, for any other angle, then surely I can trisect any angle I want. It's precisely the fact that this can't be done for some angles (using the standard tools) which lea...
by Meteoric
Mon Jun 13, 2016 12:50 pm UTC
Forum: Mathematics
Topic: Completions, Cauchy sequences, and countability
Replies: 7
Views: 2184

Re: Completions, Cauchy sequences, and countability

Maybe I'm misinterpreting your dissatisfaction, but isn't Cantor's theorem also a diagonalisation argument? Huh, you're right! I hadn't thought of it that way before. Diagonalization on decimal representations feels kind of hacked together, because you need to invoke the additional fact that decima...
by Meteoric
Mon Jun 13, 2016 5:57 am UTC
Forum: Mathematics
Topic: Completions, Cauchy sequences, and countability
Replies: 7
Views: 2184

Completions, Cauchy sequences, and countability

The most commonly presented proof the uncountability of the reals is the diagonalization argument, using decimal representations. While clearly valid, this has never been particularly satisfying to me. Perhaps I am unfairly biased against decimal representations. Recently, studying the p-adics has i...
by Meteoric
Wed Jun 08, 2016 3:57 am UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 88306

Re: Math: Fleeting Thoughts

I don't know if this is the original etymology, but for example sqrt(6) is a root of the polynomial x^2 - 6.
by Meteoric
Wed Jun 08, 2016 3:11 am UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 88306

Re: Math: Fleeting Thoughts

Oh, so it's an extended meaning of the term "root"! Thank you, that makes sense now.
by Meteoric
Tue Jun 07, 2016 8:33 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 88306

Re: Math: Fleeting Thoughts

Another dumb question: I'm struggling to parse this sentence. "A polynomial with integer coefficients has a root in Z_p if and only if it has an integer root modulo p^k for any k >= 1". I get what it means to say two numbers are congruent mod n; it's a relationship between two numbers. I'm...
by Meteoric
Tue May 31, 2016 10:16 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 88306

Re: Math: Fleeting Thoughts

Oh, duh. Thank you.
by Meteoric
Tue May 31, 2016 9:29 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 88306

Re: Math: Fleeting Thoughts

Is it valid to say that a set which is not open must be closed? Or is there some third possibility?
by Meteoric
Sun May 29, 2016 4:18 pm UTC
Forum: Mathematics
Topic: Misunderstanding basic math concepts, help please?
Replies: 319
Views: 29070

Re: Misunderstanding basic math concepts, help please?

I specify a particular excluded middle system X to 'describe' all z. X -> 'describe' all z. Since I want X to be 'describable' then I think the following are valid deductions: 1. X must be a member of z. 2. All 'describe' are members of z. 3. All z are 'described' within X. 4. not-z cannot be 'desc...
by Meteoric
Wed May 25, 2016 9:37 pm UTC
Forum: Mathematics
Topic: Misunderstanding basic math concepts, help please?
Replies: 319
Views: 29070

Re: Misunderstanding basic math concepts, help please?

The first thing to note about divided middle propositions is that they don't have a middle bit. For every mathematical proposition* there is no semi-x. The law of the excluded middle is about truth values, not propositions. For any proposition x, either x is true or !x is true, but never both. For ...
by Meteoric
Thu May 19, 2016 5:50 pm UTC
Forum: Mathematics
Topic: Meta-Probability Problem
Replies: 16
Views: 2613

Re: Meta-Probability Problem

You'd run into a bit of a technical problem, because normals are over the entire real line, while probabilities are restricted to [0,1]. You could use some kind of truncated re-scaled normal, though, or something that approximates that. Unlike the uniform, there's more than one possible (approximate...
by Meteoric
Sun May 15, 2016 3:37 am UTC
Forum: Mathematics
Topic: Meta-Probability Problem
Replies: 16
Views: 2613

Re: Meta-Probability Problem

Well one of the heads involved in the discussion claims that because every distribution has a "complementary distribution" (i.e. p <=> 1-p) then the averages of the infinite probabilities gives a uniform distribution. I'm skeptical because of the way infinities are handled. This seems lik...
by Meteoric
Sat May 14, 2016 6:06 am UTC
Forum: Mathematics
Topic: Meta-Probability Problem
Replies: 16
Views: 2613

Re: Meta-Probability Problem

This comes to the fuzzy edge of what we mean by "probability". Ostensibly, coin flips are still independent and identically distributed, we just know that the probability of heads p is larger than 0.5. The chance of a head and a tail is 2*p*(1-p), so we can immediately conclude that the ch...
by Meteoric
Thu Apr 28, 2016 2:11 am UTC
Forum: Mathematics
Topic: Misunderstanding basic math concepts, help please?
Replies: 319
Views: 29070

Re: Misunderstanding basic math concepts, help please?

Xanthir wrote:. Again, "axiomatic mathematics" is not itself a logical system.

Would it be reasonable to phrase this as "There are many distinct axiomatic mathematics"?
by Meteoric
Sun Mar 06, 2016 5:32 am UTC
Forum: Serious Business
Topic: Communication? I am reading it long already.
Replies: 6
Views: 2725

Re: Communication? I am reading it long already.

I've spent a lot of time working with kids. Enough to be thoroughly divested of the idea that important thoughts are always communicated formally and properly. By all means, if you feel that someone isn't meeting you halfway in the attempt to maintain communication, you are not obligated to continue...
by Meteoric
Wed Jan 13, 2016 1:02 am UTC
Forum: Science
Topic: The Argument from Contingency
Replies: 42
Views: 3242

Re: The Argument from Contingency

Plenty of religious traditions have an Ultimate Source of Stuff which is not a god. There's no reason to call your ultimate source of stuff "God" without additional justification, and doing so prematurely is a great way to get confused.
by Meteoric
Tue Jan 12, 2016 8:30 pm UTC
Forum: Science
Topic: The Argument from Contingency
Replies: 42
Views: 3242

Re: The Argument from Contingency

Yeah, but if most of your first-year science was spent on "The Science Of Star Wars", that would ALSO not be a good sign about the structure of the curriculum.
by Meteoric
Tue Jan 12, 2016 4:11 am UTC
Forum: Logic Puzzles
Topic: Cannot Solve This
Replies: 2
Views: 3689

Re: Cannot Solve This

To make sure I'm understanding you, this is just a fancy way of displaying four equations? A-B = 9 C-D = 14 A+C = 12 B+D = 2 Is that correct? Because if those are the four equations, then your title is accurate: this system indeed cannot be solved. The sum of the third and fourth equations states th...
by Meteoric
Wed Dec 30, 2015 6:38 am UTC
Forum: Science
Topic: Training in stronger gravity
Replies: 7
Views: 1647

Re: Training in stronger gravity

I'd expect higher gravity to be really bad on the joints, the backbone, circulatory system. And generally the same as obesity. Long-term high gravity, almost certainly. Short-term high gravity for training purposes might be useful, but that's slightly further up the tech tree than weight training e...
by Meteoric
Fri Nov 13, 2015 7:01 pm UTC
Forum: Science
Topic: Gravity-temperature musings by Toffo
Replies: 162
Views: 17041

Re: Gravity-temperature musings by Toffo

I'm not talking 'everyday language' - I'm talking science. I'm querying your claim that science doesn't include energy input in the form of heat as part of the energy of an object. You want to argue about science, while I want to ponder some interesting inanimate objects. Oh yes, I said "we ar...
by Meteoric
Sun Aug 23, 2015 11:09 pm UTC
Forum: Science
Topic: Doctor/Quack/Shill Vitamin D?
Replies: 14
Views: 2698

Re: Doctor/Quack/Shill Vitamin D?

Basing your medical advice on one new study is also super sketchy, even if the study is real. Individual studies are wrong about stuff all the time.
by Meteoric
Wed Aug 12, 2015 5:45 pm UTC
Forum: Science
Topic: Life in the universe reaching stability
Replies: 2
Views: 1282

Re: Life in the universe reaching stability

It sounds like you're describing the concept of a great filter.
by Meteoric
Sun Aug 09, 2015 2:15 am UTC
Forum: Science
Topic: Puzzling artifacts and reasonable reasoning
Replies: 79
Views: 11639

Re: Puzzling artifacts and reasonable reasoning

Cradarc wrote:Here's a question: Why should we care?

It probably doesn't help physicists much, unless it proves the existence of time travel. For archaeologists and historians, it might have enormous import, and completely restructure our understanding of the ancient world.
by Meteoric
Tue Mar 10, 2015 5:07 am UTC
Forum: Fictional Science
Topic: Maximum efficiency when doing work over a distance
Replies: 57
Views: 12792

Re: Maximum efficiency when doing work over a distance

Telekinesis is in fact impossible, so there's not much to worry about there. But if it were real, there'd be nothing conservation-violating about a telekinetic pushing a satellite into a different orbit, just as there's nothing conservation-violating about magnets pulling things around. Well, as lon...
by Meteoric
Fri Jan 09, 2015 7:56 pm UTC
Forum: General
Topic: saving the internet
Replies: 29
Views: 4394

Re: saving the internet

It doesn't charge at all. You just throw it away. See, first you save all of wikipedia. You read like 5%. Then you throw it away and buy another one. That falls under the "the makers need a stern talking to". And they should be fired. From a cannon. In the direction of the sun. But why wo...
by Meteoric
Sat Dec 27, 2014 6:50 pm UTC
Forum: Science
Topic: Evolution: Random or intentional?
Replies: 187
Views: 19180

Re: Evolution: Random or intentional?

I don't think I agree with the claim that intent is just a feedback process. Consider the blue-minimizing robot . Assigning intent to the robot, even a circuitous intent like "reduce the amount of blue perceived in my camera software", still fails to describe edge cases like the hologram p...
by Meteoric
Fri Oct 31, 2014 7:32 pm UTC
Forum: General
Topic: Fungibility of Children (Split from xkcds favorite charities)
Replies: 51
Views: 7204

Re: Fungibility of Children (Split from xkcds favorite chari

I kinda have to wonder whether Meteoric has ever watched a movie or read a book about heroes, because to me it's pretty clear that we as a society *don't* want heroes who impersonally calculate the final utility of every decision. People who do that are sociopaths, and we tend to view them as somew...
by Meteoric
Fri Oct 31, 2014 6:17 am UTC
Forum: General
Topic: Fungibility of Children (Split from xkcds favorite charities)
Replies: 51
Views: 7204

Re: xkcd fora's favorite charities

A trolley car is hurtling down the tracks... Let's switch that around. The switch is old and rusty. It might not work at all, and it might derail the train killing the passengers on it. You don't know if there are any passengers on it. Also, the donkey and the sickly Burmese children are kind of fa...
by Meteoric
Fri Oct 10, 2014 6:44 am UTC
Forum: Science
Topic: Let's terraform Jupiter!
Replies: 26
Views: 6419

Re: Let's terraform Jupiter!

gladiolas wrote:But eventually, a solid surface forms

From what? Isn't Jupiter 90% hydrogen?

As long as we're doing megaengineering, maybe you could drop a rocky planet into it?
by Meteoric
Mon Sep 08, 2014 12:07 am UTC
Forum: Science
Topic: Schrodinger Cat Disproof (Samuel Jacobs)
Replies: 88
Views: 15461

Re: Schrodinger Cat Disproof (Samuel Jacobs)

"The cat is simultaneously alive and dead" also seems like the kind of trouble you can get into when you carelessly translate physics into everyday terms. "There are temporarily two cats, one alive and one dead" might not be a terrible alternate translation, and completely sidest...

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