It is amazing to me how many well meaning folk can confuse a simple thing so badly

it happens when you explain something in a complex fashion. eg - a page of math, instead of 'if you plug this into here, like so, to get this effect, see the notes below to why you get this effect' - compare say a complex cooking show to Good Eats. you'll learn more from Good Eats*....*

*actually building on that. it's like trying to teach cooking.  BB... you are Iron Chef. we need Good Eats instead.