Ahead of the release of his new film "3 Idiots", Bollywood actor Aamir Khan Thursday drew a distinction between the term "idiots" and "stupid", saying that "idiots are very normal persons" who at some point prove themselves in an "unconventional way". At an event in a city hotel to promote the first song of Rajkumar Hirani's "3 idiots", Aamir said: "Idiots are thought to be very normal persons but