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>Mathematics, especially pure mathematics, has always been about communicating stories that help us understand reality more deeply.

I'm pretty sure pure mathematics is the part of math which is not about reality.


Reality encompasses more than the physical universe. Abstract mathematics describe an aspect of reality, too.

One might argue that mathematics is more fundamental to reality than space and time, which emerge from it.

I've been daily driving Linux since ubuntu 12.04. Things have improved a lot. It used to be the best OS for (a certain class of) programmers. It's now the OS I installed on my 7 year old son's computer. Things like connecting Bluetooth peripherals, multiple audio devices, multiple screens (with multiple DPI) are a not just possible, but easy now, and robust.


I also think the analogy doesn't work. In the plane situation it seems obvious that the luggage should be ejected before passengers, which is what the guy was asking ?


The analogy doesn't work because you can't call fork() on the plane and then it duplicates just the seat for the passenger or pilot that did something different. Also, killing them rather ghastly.


Germany has over 83M people.


Thanks for your work. Moved my company from Slack to self-hosted Zulip after Salesforce unilaterally decided to transfer our account to Alibaba Cloud and the transition has been very smooth. We especially appreciate proper markdown support !


Wow what the hell, Salesforce.


The slide is so bad it might be intentional. The intent would be to be reassuring enough that no one will point at Boeing and say "Boeing technical failure strands astronauts in space", while providing just enough information that in the event (at the time of writing the slide considered very unlikely) things go bad, they can say that nothing was withheld.


Yeah, the problem here isn't Powerpoint, it's what it said. This is a case of shoot the messenger. Powerpoint doesn't hinder communication, it lets people think they understand when their actual knowledge is superficial and can easily be a case of the primrose path.



That's pretty neat! What's the C++20 feature that enables this?


From a quick look, generalized constexpr evaluation, but in practice it relies on parsing non-portable decorated function names from things like source location. An ugly, slow, but effective hack.


Ion drives do not escape the rocket equation, they simply have a higher Isp.


They do if the ions you’re using are collected from the atmosphere around you rather than coming from a tank on your vehicle.


> do if the ions you’re using are collected from the atmosphere around you rather than coming from a tank on your vehicle

This [1] looks like a plasma propulsion engine [2]. They'd need to carry propellant. That said, they're pre-staging, so the traditional rocket equation doesn't apply.

[1] https://www.youtube.com/shorts/uTfrXf_WHEY

[2] https://web.archive.org/web/20161018201525/http://alfven.pri...


I find it odd that twitch would rather shut down their service than simply stop offering a free tier. They already have an ad-free service called Twitch Turbo, surely enforcing usage in Korea wouldn't be prohibitively difficult. This makes me think that they are trying to spark outrage.


I think that would decimate their user numbers, which is a bad deal for the streamers too since they make money on sponsorships/ads and based on audience size. Hard to grow an audience when folks have to pay for the service. No idea how much of an average size streamer's income is based on donations on stream compared to brand deals. I wouldn't expect the average user to both pay for a sub to twitch, and also donate to the streamers.

I won't pretend to know what Twitch knows, but watching for free is definitely integral to how Twitch acquires users.


Doesn’t shutting off the service decimate their numbers more?


That's not obvious. If the pay-to-watch version of Twitch isn't viable, it will have no streamers and no users, but it will cost more than the we-no-longer-exist version.


A fixed price tier cannot cover the full cost of that user's variable stream usage.

Twitch is unable to charge per hr streamed - nobody would accept that pricing, esp. if it was originally free.

Removing twitch from korea is the best move, since koreans are the ones losing out - which hopefully as a democracy, they elect someone to change this sort of lobbying from the ISP industry.


It might work short-term, but without a free tier, can they get enough new customers to replace subscriber loss over time? Otherwise they'll just slowly bleed subscribers until it's no longer profitable to run transit to and CDNs in Korea.


Twitch's market share in Korea is very small. Domestic streaming services like Afreeca are the dominant player. If I had to guess, Twitch doesn't have enough users in Korea for a paywalled system to turn things profitable.


According to https://news.ycombinator.com/item?id=38539167#38539479 Twitch is the most popular streaming service in Korea, just slightly ahead of Afreeca.


They're not, and it's a very annoying requirement. Even 5V/3A was hard to provide reliably. On the other hand, rock pi supports 12V/2A, which modern chargers will provide without any issue.


Anything that can't supply 5V/3A is not a modern charger, that combination is mandated by USB-PD for anything that can provide 15W.


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