Artificial Intelligence / Unit 8 AI 0411 short lesson, about 20 seconds
Overfitting
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The idea
A learner overfits when it extracts regularities truly present in the training pile but absent from the world — training performance rises while real performance falls.
In practice
Every festival day in training sold out — true, both of them — and the learner promoted the accident into a rule.
Where people slip
Small samples brim with meaningless patterns; deep enough elaboration can memorize any pile, accidents included.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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