The main video is talking about a genetic breeding model of how to make machines learn. This method is simpler to explain or just show. Here is a machine learning to walk or play Mario or jump really high. A genetic code is an older code but it still checks out and I personally suspect in the future genetic models will have a resurgence as compute power approaches crazy pants. However, the current hotness is deep learning and recursive neural networks and that is where the linear algebra really increases and explainability in a brief video really decreases. But if I had to kind of explain how they work in a footnote, just for the record, it's like this: No infinite warehouse. Just one student. Teacher Bot has the same test, but this time Builder Bot is 'Dial Adjustment Bot' where each dial is how sensitive one connection in the student bot's head is. There's a lot of connections in its head so a lot of dials. A LOT, a lot. Teacher Bot shows Student Bot a photo and Dial Adjustment Bot adjusts that dial stronger or weaker to get Student Bot closer to the answer. It's a bit like adjusting the dial on a radio. Is that still a thing? Do cars have radios still? I don't know, anyway. You might not know the exact frequency of the station but you can tell if your getting closer or further away. It's like that but with a hundred thousand dials and a lot of math, and that's just for one test question. When Teacher Bot introduces the next photo, Dial Adjustment Bot needs to adjust all the dials so that Student Bot can answer both questions. As the test gets longer, this becomes an insane amount of math and fine tuning for Dial Adjustment Bot. But when it's done there's a student bot who can do a pretty good job at recognizing new photos, though still suffers from some of the problems mentioned in the main video. Anyway, that the most babies' first introduction to neural networks you will ever hear. If it sounds interesting to you and you like math and code, go dig into the details; machines that learn are the future of everything. Maybe, quite literally, the future of everything, and given what we've put them through, may the bots have mercy on us all.
