"they have been accompanied by very prominent written warnings that you must complete the full prescribed course" I'm ashamed to admit that the big part of my

"they have been accompanied by very prominent written warnings that you must complete the full prescribed course" I'm ashamed to admit that the big part of my adult life I didn't know the reason behind that, and always assumed that to be of a kind "you must eat your whole meal" constantly told by grandma. I'm sure I'm not the only one..