Honestly struggling to comprehend how this one isn't neutral.
As far as we know this was a supply-chain attack specifically on military pagers actively used by Hezbollah, and (right now) it looks like most injured are in fact Hezbollah members (which makes sense, since no one else has any reason to carry such a pager). (With some sad and unfortunate exceptions.)
Clearly they should not have passed linear algebra without this understanding, and you're free to fail then if they didn't personally manage to correct for it by the end of the term.
I'm not. I'm a new user, and I notice that Duolingo kind of sucks, but I am getting some amount of value out of it. I'm very open to suggestions for better language learning apps, though.
As someone who didn't like the idea of learning a language at all but has to, I'm glad that Duolingo gave me a very, very easy way to get started with literally anything at all. It's simple and streamlined, meaning that it's easy to start and stick with it instead of getting hung up on how to find a good textbook, or figuring out how to use Anki "properly".
This also applies to practicing every single day: I find it easy to do a few Duolingo "lessons" as warm-up before delving into more in-depth practice.
Nowadays I would not use it for real "practice" at all. I use it to check my understanding for 5-15 minutes a day. If I make mistakes in Duolingo (eg. forming the plural, remembering the dative for a given grammatical gender) then I look these things up and study them.
I might drop Duolingo completely at some point, but for now I'm getting a non-zero amount of value out of it—I am increasingly looking into better options, though. I'm already looking Anki, and I'm sure there are some other language learning apps out there.
This is also what I'd call the classic issue with Duolingo. Or rather, one of them, considering that the app has all sorts of issues.
If you use nothing but Duolingo you'll plateau very quickly. It's probably "okay" as a casual side spaced-repetition learning tool—when you're learning languages you generally want to pull from several different resources, and learn with different tools anyway. But don't make the mistake of thinking that Duolingo alone will get you anywhere.
I think this universally applies to repetition-learning, at least when it comes to languages. You need to "cross-train".
As far as we know this was a supply-chain attack specifically on military pagers actively used by Hezbollah, and (right now) it looks like most injured are in fact Hezbollah members (which makes sense, since no one else has any reason to carry such a pager). (With some sad and unfortunate exceptions.)