[presidente20]

Great point. I think there are some subtle things about Maths in particular and science in general that make it more educational. One is learning to accept and understand things that are at first counter-intuitive. When solving Maths problems I seem to recall that it was often easy to fool myself into a wrong solution due to faulty intuition. Maths trains you to distrust it, dig into problems, use logic and check/test your solution. Furthermore the hard feedback you get helps all the above. Discussing something or writing an essay on a topic which doesn't have a defined answer doesn't seem like a great educational experience even though the activity itself is valuable.