# The cost of being wrong. Confidence matters.

Calculate cross-entropy with real probabilities and see why confident mistakes cost more.

Part 4 of the six-part logistic regression series. Predict, explore and explain one idea through numerical controls, a focused interactive, hints and thinking questions.

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Canonical page: https://21ifm.com/ml/cross-entropy

## Explore

- [View the whole logistic regression series](https://21ifm.com/ml)
- [Try a free foundation lesson with Zon](https://21ifm.com/basics/sine)