aluren
Joined 8 years ago
Joined 8 years ago
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.
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).