What did you learn today?

[atdsutm]

What I learned today: Another person's loss is somebody else's gain.

same as what iraya has just said when you get something or do something, there is something being sacrificed to get it.

in economics it is called "opportunity cost"

WTF im getting what one of my prof called "economist syndrome" where you always apply economic concepts even at the most simplest of things in the world