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bluecoffee commented on a post in r/statistics
bluecoffee 1 point

Eyeballing it doesn't work for more than two variables. Suppose you have two standard normals, X and Y, and their sum Z = X + Y. Then these have perfect collinearity, but a pairwise plot like the above will just show ~70% correlation between X and Z and Y and Z.

getrichnever 20 points

The section of this video starting around 0:48 looks like 3d animation to me. Am i wrong? Is it possible they would fake some of this footage?

bluecoffee 17 points

The audio is faked, but the footage is real. The BBC got in trouble a few years back by shooting in a zoo and subsequently became very conservative about faking footage. If they were using CGI the tabloids would have a field day.

bluecoffee commented on a post in r/gifs
koemanssecretbrass 5 points

it is moving. look at the espn sign

bluecoffee 2 points

It isn't - look at the people in front of the ESPN sign (easier in the source). If the floor were moving by 2ft, they wouldn't be calmly standing there.

It's an illusion, most likely generated by a motion stabilization algorithm that stabilized the wrong thing.

bluecoffee commented on a post in r/funny
KamRiN 83 points

This means I can't even say "Hi", or "Have a nice day". Both of which would creep me out in prison.

bluecoffee 67 points

Yes. Exactly.

If you pass a woman you don't know on the street, leave them alone.

randerson2011 22 points

Nah. Still gonna say hi or give them a smile whether they're a hot girl or an old man or anywhere in between. You can have fun never interacting with anyone because that's the "polite" thing to do, though.

bluecoffee 1 point

There is a substantial sub-population of men who get aggressive when people don't engage with their casual conversation. As such, people will feel compelled to engage with your casual conversation even if they don't want to because they don't know if you're one of those men.

If you know this and you engage strangers anyway: you're an asshole. Yes, it's terrible that this means you don't get to do a thing you want to do. But it's decidedly less terrible than forcing all those other people to do a thing they really don't want to do.

bluecoffee commented on a post in r/EffectiveAltruism
cnoopy 1 point

It's not simply a matter of economic statistics. To say poor people in America live like kings compared to other countries tells me you haven't hung around poor people in America. Misery isnt just about per capita income

bluecoffee 3 points

Yes, but the cost of fixing misery is overwhelmingly about per capita income.

The cost of averting one disability-adjusted life year in the developed world is about ~$30,000.

The cost of averting one disability-adjusted life year in the developing world is about ~$30.

bluecoffee commented on a post in r/videos
clashbuster 11 points

I'm heard this rhetoric before and it's kinda BS.

"Germs" You mean bacteria? That shit is everywhere and we cannot stop it no matter what.

Most food is made with your hands with a cook breathing over it. Germs. Lot's of em boo hoo.

There's like a billion of em in your mouth at all times.

bluecoffee 22 points

You're right, there are germs all over the place. You're immune to lots of them and anyway they're generally pretty harmless because, well, they're the kind of germs that're adapted to countertops or dirt or whatever.

The germs that you blow out of your mouth though are the germs which are adapted to the human respiratory system. And now they're on your cake, and in a moment thirty people are going to stuff that cake down the entrance to their own respiratory systems.

bluecoffee commented on a post in r/bouldering
bluecoffee 9 points

For the general 'how long for what grade': depends on the gym, depends on the country, depends how often you go, depends how long your sessions are, depends who you learn from, depends how old you are, depends how fit you are, etc. There are some people at some gyms who'll manage V5 in a few months; there are other people at other gyms that won't manage it ever.

But for this specific question:

The gym I go to goes up to v10/v11 depending on the month. How long does it take to get there?

Years and years.

bluecoffee commented on a post in r/london
mrs_shrew -39 points

Don't you remember doing dickish things at that age too? 16yo haven't got a full sense of the world yet so they're susceptible to bad influences. Whilst I wholly agree that acid throwing is very serious and should be treated as such, locking kids up just makes fucked up adults. He, along with all criminals should be given proper rehabilitation when inside but I doubt we have the funds so he'll get the short sentence cos the prisons are full but without any proper guidance in life.

BadSysadmin 6 points

Yes, perhaps this boy could be rehabilitated, and yes, perhaps it's a shame for him that we've got to lock him up for life - but we do have to, pour encourager les autres.

bluecoffee 9 points

Deterrence through excessive punishment is not very effective. See also: US drug laws.

People are fundamentally bad at evaluating tail risks.

bluecoffee 8 points

Going by the last thread on the topic, this subreddit's priorities for punishment are

  • Retribution
  • Incapacitation
  • Deterrence
  • Rehabilitation

What I'm saying is you're gonna eat a pile of downvotes here.

bluecoffee commented on a post in r/Economics
Xipher 19 points

Increased life expectancy isn't strictly a result of people living longer, but of also a reduction in infant mortality.

bluecoffee 3 points

The drop-in-infant-mortality contribution mostly happened pre-WW2. Since then, the improvements in life expectancy have been much more uniform across ages.

Here's a nice chart.

bluecoffee commented on a post in r/bouldering
bluecoffee 13 points

As general video-making advice, remove everything that isn't in the title. People click on a video and expect to immediately see what was advertised. Currently it takes 50 seconds to get to any beta, and then after it, and then there's another 50s about falling off horses. That's at least 100 seconds in a 175 second video that could be cut away with very little loss to the viewer.

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About bluecoffee

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    November 9, 2009

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