As someone who explains complicated things to people in writing for a living, this is one of the best guides for business and technical communication I’ve ever seen.
How do you resist the urge to describe all possible exceptions? In my writing, I describe something, then find myself spending four times as many paragraphs explaining all the exceptions.
Fake example:
A bicycle has two wheels of equal size.
Some bicycles have two extra smaller wheels on each side to train bicycle riders.
Occasionally you might have one helper wheel on the left or right instead of two, but it's rare.
If a bicycle has two wheels in the back and one in the front it's a tricycle. Not to be confused with training wheels.