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> Having never taught in a classroom or worked for even a single day in education, it’s a question I’m totally unqualified to answer.

Yes, but, you attended a school, no? You are more qualified to answer than you think.

> for the average student.

Who is the 'average student?' This is such a non-existent class I'm skeptical of it's invocation.

Not once is class size mentioned. Perhaps putting 30 randomly selected people in a room and then trying to move them lock step through a subject is complete folly?

Your schools are designed for administrative efficiency, not student outcomes, and "average people" simply do not exist.


> They’re meant to communicate some metric about the market.

Is that why people spend time, money and effort creating and maintaining them? They're just broadcasters? That seems dubious.


Once you have an index, you can offer all sorts of products around it.

-You can offer a return swap to an investor so he can "invest" in the index. You can alternatively build a whole list of derivatives and products around it and offer them to investors instead (think Itraxx,Vix,etc)

-A fund manager can use it as his benchmark and you get to see if he is good or not.

-If its a factor index you can now use it for risk management and return attribution.

The key thing today is that creating a new index that isn't a fad is very hard. There has also been a lot of consolidation of indices into few players (SP, MSCI, Bloomberg) as it's obviously an economies of scale business.


> Is that why people spend time, money and effort creating and maintaining them? They're just broadcasters?

Yes. There are more indices than there are stocks. Publishing an index is, business wise, a game of getting funds to license them.


I mean, they get paid for it, sometimes quite a lot, for this "broadcasting". $100mm of AUM gets you like $200k profit/yr. (Like $500k minus fees)

The printing press was very much an invention /not/ at the disposal of the citizens. It analogizes poorly to the Internet.

Of course not, it’s the books that people had access to.

How many people are involved in ISPs, data centers, and other internet backbones? Most people are consumers rather than producers or "printing press" operators.

You just broadcast your voice to millions of people, became instantly archived in google and several other sites, all at zero direct cost to yourself, other than the monthly access fee.

There is an obvious distinction.

Finally I'd ask you to observe the entirety of social media's existence.


The vast majority of people never broadcast to the public like we're doing right now.

Actually it's perfect. How long did it take rulers to go from fighting the printing press to using it for propaganda and their own ambitions? The internet has just speed run that same course.

> How long did it take rulers to go from fighting the printing press to using it for propaganda and their own ambitions?

Probably the moment something negative was published about them.

> The internet has just speed run that same course

And citizen journalism has never been more powerful.

There will be no invention of man that will eliminate jealousy, avarice or hatred. Objectively I'd rather be alive today than at any point in our recorded history.


> in effect the IPv6 version of ARP

NDP. That's a discovery protocol not an elimination protocol. There's no guarantee that a link local address isn't available on multiple networks.

> the OS will pick the one

Linux will simply pick the first entry in the routing table. It may make this appear as if it's working by default or some underlying magic; however, it's literally just the very first entry that matches.


> you have to identify which is which somehow

The _routing_ system does. You have the same problem if you have multiple public IPs on a machine. Your local routing will not automatically return packets back through the address they came to. They will go to the _default_ route. So if you have this configuration you need to setup either the routing tables or the firewall to re-route packets "back out" the proper interface or IP address.

This is strictly a routing problem and not an addressing problem.


> to be assigned randomly from 169.254.0.0/16

Yes, but the question is, "what if an address in this range is assigned to _two_ interfaces at the same time?" Now your local routing information base cannot distinguish which interface to use when trying to reach other hosts in that same network. So, it's fair to say, it's not a feature even available in IPv4.

The second difference is IPv6 is almost always going to have link local addresses assigned and machines with multiple network interfaces are the norm rather than the exception.


SELECT excuse FROM ignorance ORDER BY snobbery DESC LIMIT 1;

Love it! I am speaking as someone who has used SQL for over two decades with very good success. I find it extremely logical and a good fit for my mental model. Long live SQL!!

I've never once had that happen. It's always straight to the unrolled article.


> The case against DNS for internal IT infrastructure

In SOHO settings I might actually agree, but, this is where I think site administered and distributed multicast DNS was a missed opportunity.


If your DHCP server + DNS Resolver support it you can set up a local TLD and register machines by hostname using DHCP and then have the DNS Resolver in your router resolve those hostnames as hostname.local-tld. You don't need any configuration other than at the router to make this work for most machines on the network.

> or the address has to change for some reason

One annoying reason is you don't own it/have access through the owner anymore.

> Sure would be nice to just update the DNS record to point to the new address.

EC2. Elastic IPs are easy enough, but, precisely, I would just like to make a Route53 alias for an EC2 instance and not even have to care.


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