Situation is as follows:

There are 3 doors in front of a group of people and they are asked to choose among the doors and take the surprise kept behind the doors.

Door 1 has happiness.

Door 2 has knowledge.

Door 3 has money.

An intelligent person would choose door 2 and would work hard to earn money and be happy.

A wise person would choose door 1 and would demand no more because if in the world you are happy you need nothing else.

A clever one would open door 3 fill his bag with money, then open door 2 and gather knowledge then to door 1 to have happiness because it isn't mentioned that you can only choose and open only one door ;p

P.S. This was just a mere example, a way to relieve my final defense masters program pressure…

And what stops the wise and intelligent ones from opening other doors?

Not taking it very seriously bro, but if it is just one item behind the door, and once taken it's gone, then the wise one still got the best bargain. Money/knowledge can never buy you happiness.

Enjoy your defense.