Occam's Razor
Occam’s Razor :This principle thought up a long time ago by William Occam while shaving(!) states that the shortest hypothesis, or solution to a problem, should be the one we should prefer (over longer more complicated ones). This is one of the fundamental tenet’s of the way western science works and has received much debate and controversy.
Which means always the smallest, simplistic equations explains the phenomenon in the best possible way.