[ Exceptions ]

For every rule, there are exceptions.  We learn about this for the English language (“i before e except after c); we learn this in math (statistics, imaginary numbers, LaPlace Transforms). 

In many things (height, test results, random events) there is a bell curve, with most results in the middle (average), and tails on each end which are the ‘exceptions’.

So a perplexing problem is whether to make rules for the norm, or for the exception. 

And the answer is changes depending on the context.  Rules for recording data is one thing; rules for battling a pandemic are something else completely.