There are two processes for attaining knowledge: one is inductive and the other, deductive. The deductive method is considered to be more perfect.
How is the premise that all men are mortal arrived at? Followers of the inductive method wish to arrive at this premise through experiment and observation. We may thus study that this man died and that man died, and after seeing that so many men have died we may conclude or generalise that all men are mortal. The major defect in this method is that our experience is limited.