aluren
Evolution works in more complicated ways than the toy model of sickle-cell disease/malaria you've been taught in high school. Just having an edge in a particular situation is no guarantee for your alleles being selected. But even then, there could very well have been very little mixing while still everyone shares the same set of ancestors. Even a little mixing is enough.
>The simulations are nice, and make a theoretical lower bound but a single remote tribe somewhere on earth would push it back tens of thousands of years.
The subject is well-refined and the results are old news so I'm going to go on a limp and assume that the researchers who did the simulations know how to do their jobs and accounted for that possibility you described.
>DNA Sequence an Andaman islander and every bushman and Amazonian, then we'll see.
Ignoring the fact that the various peoples in the Amazon have not been isolated at all, or that the Adamans have been settled approximately in the time range of the estimated IAP and have known a few exchanges since, that's not how genealogy works. See, if a single outsider gets into the Adamans or Australia and starts having children with locals, and assuming the line doesn't die out, there's a statistical certainty that eventually every current living person in that territory will be descended from that outsider. Just one is enough. It doesn't matter that their genetic contribution is diluted to the point of being barely detectable. I invite you to read the link about IAP in more detail and do some rudimentary math on why it has to be the case (or more accurately, why the opposite is so statistically improbable as to be pretty much impossible).
By the way, the fact that all of us share the exact same set of ancestors from a few thousand years ago isn't new, shocking or controversial, only the exact date is still subject do debate. You may find this link useful: https://en.wikipedia.org/wiki/Identical_ancestors_point
Alternatively, if you really want to punish minor things, fines could be dependent on your income.
Yes that's why I took the conservative estimate of 7000 years, otherwise with the panmixia hypothesis it only goes back 3000 years or so.
I don't have anything against online dating in principle, though I do find it pretty weird, but there's got to be a better way than relying on obscure matchmaking algorithms, shitty apps optimizing for engagement and your being single (remember, if you're not single you're not using the app), run by shady companies harvesting all of your data. Americans will always surprise me in their ability to surrender every single aspect of their life to megacorporations, even the most intimate and personal ones.
I have a feeling that non-scientists see science as an invisible ethereal, platonic construct that's slowly being unveiled by hardy explorers, uh I mean scientists, until at last the whole of the Truth and nothing but the Truth fully shines in its enlightening splendor.
Except that's not how it works. In practice, science works by scientific consensus. What is true is what the community decides is true. The community can be convinced otherwise by contradicting evidence (or not) but the process of convincing is then subject to all the biases affecting our feeble human minds: it can be contradictory with other evidence, misinterpreted, misunderstood, deemed insufficient, coming from the wrong person, etc. It takes a lot of time for the consensus to evolve, and it's a rather a messy and political affair. There's often a running joke that a theory's acceptance depends on the old guard dying out and being replaced by the younger, more open-minded generation (relevant smbc: https://www.smbc-comics.com/comic/how-math-works)
Btw, just in case you're wondering, math is absolutely not immune from this either. Cathy O'Neil wrote an excellent post detailing how mathematical proofs work in real life (and not in some platonic imaginary world invented by laymen): https://mathbabe.org/2012/08/06/what-is-a-proof/ also with a relatively recent example: https://mathbabe.org/2012/11/14/the-abc-conjecture-has-not-b...
In addition, Firefox + ublokc origin is pretty much the only option on mobile if you want to block ads, unless you want to fiddle with hosts files or pi-holes or something.
At any rate, cell differentiation/compartmentation within a tumor has been observed, so things do get blurry indeed. It's also worth noting that there isn't a single definition of 'species' and it's all just semantics that changes depending on your field. (The traditional 'inter-fertile over two generations' you learn in high school is helpful but doesn't stand up to many observations.) Ultimately a species is what biologists say is a species.
On HN curation: while I certainly look up to this community when it comes to coding, technology and latest new software tools in general, I'm sorry to say the standards are not even remotely up to par when it comes to genomics. I assume it's because neither the mod team nor the majority of the community has a relevant background, and it's perfectly understandable. It does mean however that I, more often than not, encounter some pretty egregious stuff on here, especially when some dreaded words like "evolution" or "heritability" get mentioned. I sometimes try to chime in (and keep in mind I'm no authority beyond being a rando who happens to work in the field and knows plenty of people more qualified than me) but sometimes the disconnect between HN discussions and actual scientific community discussions is unreal.
On the paper itself: I didn't only mention its IF and voiced other concerns further in the thread. Ultimately there's a limited amount of time one may allocate to reading papers when there are literally millions of the damn things.
-Journal is completely obscure to the genomics community
-No causal genetic mechanism is shown, everything is shoved into a "heritability" black box that some people seem to think is like your video game character starting stats or something
-Authors don't have a genetics background
-It's not my field, but there appears to be a wealth of literature on how fertility rates decrease in history, none of them involving "heritability" and little is done to address, reconcile or unify that
-There does seem to be darker political overtones that are exacerbated by commenters, leading me to think the arguments are not being made in good faith
Journal IF is just a (flawed) heuristic but in this case it sets a low prior and the "updates" didn't help
Please don't regurgitate common talking points about academia issues if you're just trying to score points in support of a fringe political position, that's not at all the direction we (as scientists that are critical of academia) want to go.
Because Sweden is not ruled by a dictator? The moral thing to do would be for the government to ask "jeez, what are we doing so badly that half our population is telling us to fuck off?" and implement policies that give incentives for the population to stay there. The immoral thing to do is to go full iron curtain.
>In any case, I see it eventually resulting in a new colonialism where elites and businesses are the main ones deriving advantage and wealth from this new arrangement. Localities lose power to distant and disconnected power.
So would you advocate for the borders between US states to close down and all citizens to require a visa to change states within the US?
Why shouldn't groups of individuals have self-determination including the power to marginalize any subgroup or wage wars to others? Because it is immoral no matter how many people agree with it. Not letting people fleeing other countries' misery, war or repressive regimes is immoral no matter how many ways one wants to spin it. There are all sorts of questions on the implementation of it but the basic question (should we abandon people to misery, war or political persecution) is pretty much answered from a moral point of view.
>Different groups make different decisions about how they want to run their government (which is a good thing).
Most 'groups' are run by a single dictator imposing theie view on the rest, and even modern democracies are subject to interferences such as disenfranchising, lobbying etc. There's little legitimizing to be had on 'self-determination' there.
>For example, if you didn't control who can live in your country, you'd never be able to have a generous social safety net.
Is there any evidence for this? I mean most rich countries have both open borders within the EU and their social safety nets seem to be doing pretty fine.
>hundreds of years by plundering, enslaving, and colonizing the rest of the world.
This has got to be the most egregous case of pot calling the kettle black I've read in a while.
Now there's also the list maintainers, who also work for free. Still makes you wonder about how the world works. There's probably many other similar instances. In any case, I think these people deserve more recognition than they currently do and we shouldn't take anything they do for granted.