Epistemology is episteme (knowledge) and logos (mind and science).
Epistemology discusses the existenceand study of a science, the basic of knowledge and knowledge obtained by humans.
The function of epistemelogy in their philosophy of science is as a basis for hunan action in their daily lives, the basis for the development of science and as a means of knowing the truth of knowledge. In the scientific field can help the development of thingking about problem qnd encourage humans to think critically about an event.
As an example of the result of epistemology thingking, namely the opinion of isaac newton about the causes of apples falling down from the three which consequrntly raised question and thoughts.
As for epistemological flow:
1.empiricism: holds that all knowledge is obtained through the sense. The senses get a real impression so that accumulate into experiences.
2.ratinalism:something that is seen but not necessarily true.
3.positivism:the opinion that dogmatic believe must be replaced with factual knowledge.