![Usain Bolt 2015 race calendar](https://junglejeff.net/wp-content/uploads/2015/07/04.08.201537-570x321.jpg)
Normal versus average.
Normal is not measurable.
The average – or the mean – is measurable.
Big difference.
One is indisputable.
One completely depends on biased opinion.
Dear Son, never forget our discussion about normal yesterday.
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