My understanding (IANAL) is that the GPL restricts how you /redistribute modified versions/ of the software. So I'd argue that it passes all requirements.
Can you copy and redistribute it without restriction? Sure.
Can you modify it and install the modified version on your computer without restriction? Sure.
The only thing you cannot do is redistribute the modified version. If you do that, there are some restrictions in place: you have to provide also the source of that modified version.
That is exactly my understanding as well, and certainly that was my intent in my GPL-licensed projects.
Also, about conditions on redistribution, the vast majority of all open-source software places at least some mild conditions, like the preservation of copyright and attribution to the authors, so if there is some kind of "gotcha" here, I don't think it has anything to do with copyleft.
One of the main criteria to differentiate "rants" from "correcting falsehoods" is proper citing of sources. In the case of Grapheneos, unfortunately I often see very few sources in what they post online.
(But, if you ignore the rants, that's a fantastic OS.)
GrapheneOS has plenty of evidence and they post it alongside their claims. They post it carefully though, and are willing to provide it to people upon request.
At the time of writing, I scrolled 4 posts down and found one. GrapheneOS are security researchers, so they often are a first party source. As for the attacks, they have plenty of evidence for their claims. They avoid giving any attacks more publicity, but they usually provide evidence if you ask.
Please provide a link to this post you found, so I can tell which one you think is a citation to a source. If you want some examples of recent posts that should have a source but don't, here they are:
You have a point, but it is very ironic that this sounds a lot like the old argument "you must still learn to compute by hand because you won't have a calculator with you all the time".
As the OP discusses, the current state of the standard formally disallows it: the SI specifies that hertzes are only to be used for periodic phenomena, and becquerels only for radioactivity.
I don't recommend tennis balls for a beginner: they bounce everywhere, and you'll spend most of your time chasing the balls rather than juggling. Cheap juggling balls are around 10$.
Learning to juggle way back lasts century, I learned to juggle using lacrosse balls. Very bouncy and and a little on the heavy side. Standing over a bed helps if you are using bouncy things (they still can cause havoc in a bedroom when they bounce off each other though).
One of the IJA (International Jugglers' Association) videos that most impressed me is :
IJA Tricks of the Month by Zaila Avant-garde | Juggling Basketballs (https://www.youtube.com/watch?v=sH2E1m8Fseg). Not only does she manage the juggling but her parents let her do it indoors with all sorts of stuff around.
I actually learned contact juggling with a lacrosse ball, since its uniform color and texture make it hard to see the rotation of the ball. That way, you get the similar visual effect to a more expensive acrylic, but without the risk of chipping if you drop it while you’re still learning.
This. Something like a hacky sack also works very well. They don’t roll away from you, and they won’t drive your neighbors nuts especially if someone lives below you when they hit the ground.
This is still very mild opposition, the equivalent of a "strongly worded letter". What we should expect from a serious pope is excommunicating [1] those who start wars.
Can you copy and redistribute it without restriction? Sure.
Can you modify it and install the modified version on your computer without restriction? Sure.
The only thing you cannot do is redistribute the modified version. If you do that, there are some restrictions in place: you have to provide also the source of that modified version.
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