Answer:
Method of Experience.
Explanation:
Experiments are usually the most trustable and precise way to formulate a conclusion about some matter. Since they are based in hypothesis that have been tested in different ways until they are proven to be right, they are the ones that most people trust when they decide to know if something is wrong or right. The theory proofs itself on daily basis, since we also can make little experiments to replicate it or even just realize in a regular everyday activity.