When I see the word "illustrated," I expect to see graphs or something that would help me visualize how linear algebra works. The only thing "illustrated" about this post is that he hand drew some table which could have been easily with some basic HTML+CSS.
I think this is a reasonable expectation. I'm writing about the dot product and there is a geometric visualization for dot products, so it's fair to expect that. As I said in this comment (https://news.ycombinator.com/item?id=45802969) I focused on teaching the reader the bare minimum they would need to know to get to matrix multiplication.
I use illustrations for a lot of other things though. I use them to pace my posts, to call out things that are especially important, to reinforce written ideas with images, and to give the reader's eye a place to rest.
What graphical illustration do you think this is missing? How would that make things better? Have you ever seen http://matrixmultiplication.xyz/? Great graphical illustration. Also: a really unhelpful way to understand matrix multiplication.
This is part 2 of a series, all under the same name; the first part is extensively illustrated (and I'm not sure the part 1 illustrations are all that helpful).
I kind of hate all these, because matrix multiplication is easiest to think of as simply repeated matrix-vector multiplication, which you need anyways (and earlier).
Illustrating the dot product using the projection of one vector on another conveys the geometric idea. Then it's transparent why "orthogonal" means dot product = 0.
The author seems to be taking a different tack though, and maybe doesn't want to be too tied to this particular geometric picture
That's your preference. However "To illustrate is to make something more clear or visible. Children's books are illustrated with pictures. An example can illustrate an abstract idea. "illustrate" comes from the Latin illustrare 'to light up or enlighten.'"
IMHO, this is just another example of something that would be better off as a website/webapp than a native app. If anything, having an app that tracks ICE agents installed on your device seems more like a liability than an asset.
The problem with this approach is that it is easily bypassed. Simply point your camera at a high quality monitor playing an AI generated video, and there you go, and authenticated AI video. In the future, video evidence is going to be as convincing as it was for 99.9999...% of human history. We survived with out it in the past. We'll survive without it in the future.
I doubt it will be that easy to bypass. A fake would still have to withstand pixel-level analysis on the level of methods that already detect tampering in regular video. For one thing, that will have to be a very high quality monitor indeed to leave no detectable trace of e.g. moire patterns.
A fake doesn’t need to be perfect to be effective, it just needs to fool enough people. Most posts won’t (and couldn’t ever) be scrutinised at that level.
Even if a lot of people just lap up whatever tiktok feeds them, it still matters that people who care can get actual evidence from the real world that eventually filters out to public consciousness. It will have indirect influence, yes, but it'll still be a lot better than being fully post-truth.
We have been able to manipulate legal documents for 100s of years.
We have been able to manipulate images for over 100 years.
We have been able to manipulate images on any computer with a few hours of training for for 30+ years.
We have been able to manipulate videos with training for 20+ years.
It is an order of magnitude easier now (likely as easy as documents have been to manipulate for 30ish years now). However, this is not a new problem, courts have always had to deal with manipulated evidence.
Not just an order of magnitude easier, many orders of magnitude. We're going from hours of painsraking work done by professionals who you pay to virtually instant and as many as you want.
In 1942, Jewish doctors conducted the Warsaw Ghetto Hunger Study used the man made famine to study the physiological and psychological effects of hunger.
https://en.wikipedia.org/wiki/Warsaw_Ghetto_Hunger_Study
Not all scientific studies need to be replicated.
Apparently it is possible, at least for some people, to "cure" aphantasia with a training technique is called "image streaming." I'm on the aphantasia side of the spectrum, and it has certainly help me see more vidid images in my mind's eye. Here is a link to the article where I learned about it, which also includes a video explaining the technique.
https://photographyinsider.info/image-streaming-for-photogra...
I have no idea if the technique you linked works, but anyone stumbling across this should be aware that it has very real and potentially serious risks - if rubbing them at all increases your odds of keratoconus, just think what 10min/day for months will do.
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