teorija je
...in the scientific sense of the word, is an analytic structure designed to explain a set of empirical observations. A scientific theory does two things:
1. it identifies this set of distinct observations as a class of phenomena, and
2. makes assertions about the underlying reality that brings about or affects this class.
nijedna teorija nije tu zauvijek, ali ona je potrebna da bi se najbolje opisao svijet oko sebe. ne moraš vjerovat u nju, nitko te ne tjera, ali ju moraš imat da bi od nečeg mogao krenut u daljnja, točnija razmišljanja.