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An overfit data set.

The red line is trying too hard to fit the data perfectly; the black line makes more errors, but is closer to the truth. Via [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Overfitting.svg).

A representation of overfitting, via [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Overfitting.svg).

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