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Archived threads in /sci/ - Science & Math - 555. page

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What's your favorite psychological effect or mental bias?

Mine's the freddy-kruger effect, where you think you're smart, but you're actually just spooky.
17 posts and 4 images submitted.
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I like Parkinson's law, where giving disproportionate weight to trivial issues gives you parkinsons disease and Allan Poe's law where you can't tell if something is meant in jest or is scary.
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>>8887259
The Diane-Kruger effect makes you underestimate your mental retardation.
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Conflirtation bias

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why is there bible?
68 posts and 12 images submitted.
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>>8887080
Because the chart wasn't made for redditors.
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>>8887080
stop sharing awful, terrible "guides"
seriously this is shit
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>>8887080
Because people are terrified of the existential uncertainty we all face every day, they're terrified of subjecting their ideas, opinions, and decisions to an adult level of scrutiny, and they're terrified of what they would do without sky-papa holding them back, so they instead choose to say "Hey look the first answer I stumbled upon in life with the least effort is correct. Okay i'm done growing and changing."

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For real sustainability to happen, don't all container ships have to eventually be converted to nuclear power?

Solar and wind will never cut it, that's for sure.

The only alternative I can think of is biodiesel but that has some major downsides as well, such as land use and soil degradation.
116 posts and 13 images submitted.
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A lot of countries don't want active nuclear reactors they don't control going into and out of their borders, and they don't want uranium to be available to private shipping companies for fear of the stuff falling into the hands of terrorists

We aren't going to be seeing a lot of individual use of nuclear reactors until we find a way to make good reactors that use a less threatening fuel source
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>>8887036
basically what you're saying is that we have to wait for LFTR or fusion reactors to become feasible?
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The reason they arnt feasable is because they cant generate enough torque to push the ship at a reasonable speed

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Got BOTH inferior wisdom teeth growing horizontally. Scratch that. Fully grown, but pushing forward a bit. Doctors said I have a 30% chance of losing sensibility in lips if I agree to get operated. What do? I heard it's pretty dangerous to keep them, but also to remove them.

Is this an evolutionary fuckup?
48 posts and 5 images submitted.
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>>8886399
Yes, but so is the fact that we eat through the same hole we breath through, and thus choke to death from time to time, and then some dickhead decided it'd be a good idea to run our eustachian tubes through our nose to our ears so we get ear head splitting ear aches every other time we get sick (why does mucus go out that way anyway?)... and don't get me started on how vulnerable this spine is and that whole needing to sleep near half the day away, this delicate endocrine system that just piles on fat if you just get it slightly out of whack, yet craves carbs like nothing else regardless of your activity level, and all these joints wearing out... And aging in general.

Basically, if it doesn't stop you from breeding, or involves fundamental structural changes, it ain't getting fixed by nature anytime soon.

Put it on the checklist of things to fix when we start CRISPR'ing our babies.
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>>8886399

Wisdom tooth extraction is a huge scam.
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>>8886399
Are they causing pain? Making it difficult to eat?

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why did he never discover something deep and profound as Einstein did

did he have a completely intelligence than Einstein?
70 posts and 9 images submitted.
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>>8886206
Intelligent people study what they're interested in and they either relate it to themselves or to some external abstraction.

Depending on those factors of cognition and then external factors like time, resources, etc. that will affect their potential to make a discovery of whatever significance.
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I honestly think it helps that einstein's work is relevant to the real world in more ways. It's also easier to explain to brainlets.
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>>8886226
Bitch, they call it fucking Von Neumann architecture for a reason. That is used by people far more than relativity, Brownian motion, or photoelectric effect.

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Did you fall for the CS meme /sci/?
> pic related is a 60K job
110 posts and 16 images submitted.
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>>8885238
>CS

I'm so sorry.
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>want to fall for the cs meme
>don't want to be a manchild
>want to fall for the engineering meme
>don't want to be gay
>want to fall for the physics/math memes
>don't want to be permanently unemployed
JUST
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>>8885535
>Don't fall for any of these
>Become code monkey at 45k
Just kill me.

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Aboriginal Australians diverged from the rest of humanity 50000-100000 years ago. Politics aside, are they really modern humans or are they living fossils of a sort?
35 posts and 5 images submitted.
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>>8884426
I would consider them a sub-species that borders on new species. But with anything involving the Homo genus, its more politics than science.
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Don't they have 5% Denisovan DNA? That's a lot.

Clearly they have retained basal characteristics. Whether that extends to the brain is something I am not legally permitted to speculate on.
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>>8884426
>are they living fossils of a sort?
yup, just like some species on the Galapagos islands are and for the same reason

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These do not describe the universe. Infinite precision such as in 'pi' or 'e' does not exist.

I'm okay with mathfags using the reals but at least admit it's just pointless circlejerking that has no actual real world application.
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>>8890624
>These do not describe the universe.
right, but these do
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>>8890628
but they contain the reals
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>>8890811
>but they contain the reals
right, but you the reals aren't enough to describe the universe

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Our mind is literally determinism plus a sprinkle of quantum randomness.

Free will is such an absurd idea.
How can anyone believe in it?
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>>8890514

define free will
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>>8890514
>free will thread nr. googol + 1

MODS PLS BAN

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I am asking this totally seriously. I do not understand how psychology and sociology can actually be considered "science". Any experiment you do in these fields, there are so many variables that cannot be controlled for.
25 posts and 1 images submitted.
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>>8889882
They're not considered sciences.
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>>8889882
They apply the scientific method, they are sciences. However they've just failed to define their object of study or control their variables and are terrible sciences that almost always just become engines of confirmation bias.
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>>8889882
they call them "soft" science.
because they apply the scientific method. however, true academic rigor is impossible.

to the point where you see social "Scientists" running statistics on other scientists studies to test for bias in sample selection / rejection

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Scientists reverse aging in mice by repairing damaged DNA
http://science.sciencemag.org/content/355/6331/1312

>The researchers found that a compound known as NAD (nicotinamide adenine dinucleotide), which is naturally present in every cell of our body, has a key role as a regulator in protein-to-protein interactions that control DNA repair. In an experiment, they found that treating mice with a NAD+ precursor called NMN (nicotinamide mononucleotide) improved their cells’ ability to repair DNA damage.
>“The cells of the old mice were indistinguishable from the young mice, after just one week of treatment,” said senior author Sinclair.
>Human trials of NMN therapy will begin within the next few months to “see if these results translate to people,” he said. A safe and effective anti-aging drug is “perhaps only three to five years away from being on the market if the trials go well.”
>The researchers say that in addition to reversing aging, the DNA-repair research has attracted the attention of NASA. The treatment could help deal with radiation damage to astronauts in its Mars mission, which could cause muscle weakness, memory loss, and other symptoms

http://sci-hub.cc/http://science.sciencemag.org/content/355/6331/1312
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wow
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>>8889301
Singularity 2045
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>>8889301
Fake news

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psychology is /sci/
anyone know a good website for a free ravens IQ test?
13 posts and 1 images submitted.
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>>8888753

http://letmegooglethat.com/?q=free+raven%27s+IQ+test
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>>8888761
GEE THANKS ANON, I DIDNT KNOW THAT I COULD USE A SEARCH ENGINE TO FIND THINGS.

I HAD THIS REALLY STUPID IDEA THAT I COULD GET THE RECOMENDATION OF AN ACTUAL HUMAN BEING INSTEAD OF A SEARCH ENGINE

LOL THATS REALLY DUMB OF ME
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>>8888753
>psychology is /sci/
No it's not. Any idiot can be a psychologist.

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>biology
>hard science
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>>8887663
agreed, biology is a retarted pseudo-science, you don't even need to do any math
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>>8887663
>shitpost
>2017
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>>8887667
I mean at some point math is only less rigorously applied in bio because rigorous modeling of biological phenomena tend to quickly expose our current limitations in translating the real world into math and (more importantly) vice versa.

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First I want to make something clear. In this thread I will be discussing a problem but this is not a homework thread. I do not want nor am I asking for a solution. I want guidance. A discussion about how this problem may be approached and if there is someone knowledgeable enough to give references to books or articles that can help me out then that would be great too. I genuinely want to do this myself but I come here because after exhausting all of my knowledge I have come to the conclusion I am missing something fundamental needed to tackle this problem and I don't know where else to look for help. This is the problem:

[math]\text{Prove there is a constant } \epsilon > 0 \text{ with the following property:} \\ \text{If a,b,n are positive integers such that gcd(a+i,b+j) > 1 for every i, j} \in \{1,2,...,n\} \text{ then } \min \{ a,b \} > (\epsilon n)^n [/math]

Partial progress:
I have found and confirmed through various sources that for n=1, the smallest possible [math] \min \{ a, b\} [/math] is 14 and for n=2 it is 104.

They form the pairs (14,20) and (104,6200).
Other pairs I have found for the case n=2 are:
230 5654
494 5300
594 3128
644 5718
650 5704
664 4730
740 4654
740 6992
968 6764
1000 3794
1000 5564
1000 5654
1064 6460
1274 1308
1274 6408
1274 6698
1308 1274
1448 2714

My current understanding of the problem:
The problem is phrased in a way that makes you think [math] \epsilon [/math] have to be very small and that you probably have to advance through contradiction but what I have found with my examples is that [math] \epsilon [/math] does not need to be that small because [math] \min \{a,b \} [/math] grows really fast as you increase n.

For the case n=2 you can see that n^n will simply be 4 while the smallest [math] \min \{a,b \} [/math] is 104, way bigger.

That is why I think this has to be a direct proof that will involve approximating [math] \min \{a,b \} [/math].

Hopefully you can lend me a hand and this thread will be remembered as good.
44 posts and 5 images submitted.
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>>8887240
Quick fix. It should be
[math] \text{for every i, j} \in \{ 0,1,2,...,n \} [/math] so the correct full statement is:

[math]\text{Prove there is a constant } \epsilon > 0 \text{ with the following property:} \\ \text{If a,b,n are positive integers such that gcd(a+i,b+j) > 1 for every i, j} \in \{0,1,2,...,n\} \text{ then } \min \{ a,b \} > (\epsilon n)^n [/math]
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>>8887240
Bump?
>>
is epsilon a rational or an integer

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There is a 0.00000012% chance that GZ60 will hit us in 17 days and literally blow us the fuck out.

https://cneos.jpl.nasa.gov/sentry/details.html#?des=2010%20GZ60
31 posts and 5 images submitted.
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>>8886838
So how can we bring that up to 90%?
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>>8886838
God I hope
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>>8886895
This guy knows whats up

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