Statistics are the triumph of the quantitative method, and the quantitative method is the victory of sterility and death . There are 3 kinds of lies. Lies, damned lies, and statistics . For example, one may use inductive reasoning to conclude that all living people have heads, on the basis of having examined a certain number of people all of whom are alive and all of whom have heads, and comparing them with a number of people without heads who are dead.
Scientific theories are ones which are open to disproof .
It is good scientific practice to question the accepted wisdom. It is important for scientists to be skeptical and to try to pick holes in the current theories. This includes what you get told by your lecturers. If there is no kind of evidence that would disprove the theory, then the theory falls outside the bounds of science. Many ethical or aesthetic judgements fall into this catergory.