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Tech Explained from Zero (video series)

A series that stacks part by part from #1. Every part has a companion video

01 ·Tech Explained from Zero (video series)·FREE·11 min read What Does AI Actually Learn? Machine Learning with One Straight Line (Tech Explained from Zero #1) We work out what 'learning' means using nothing but five points and one straight line: a loss that turns misses into a single number, gradient descent down the loss valley, what happens when the learning rate is too big, and a curve that scores perfectly on the data yet fails everywhere else. Every number can be checked by hand. With a companion video. 02 ·Tech Explained from Zero (video series)·FREE·12 min read Memorizing vs. Understanding: Catching Overfitting with Train, Validation and Test Sets (Tech Explained from Zero #2) A curve that scores perfectly on the training data, and a straight line that misses a little. You can't tell which is better until you measure on data the model never saw. We add five unseen students (validation) and five sealed students (test) to last part's five, and follow the overfitting curve, why we split three ways, and regularization — a fine on wiggly curves — with numbers you can check by hand. With a companion video.