Overfitting
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
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.
Show
Every festival day in training sold out — true, both of them — and the learner promoted the accident into a rule.
Watch for
Small samples brim with meaningless patterns; deep enough elaboration can memorize any pile, accidents included.