Empiricism is basing knowledge, beliefs, and attitudes on practical experience of the sense organs. Exclusive empiricism thus defined rejects knowledge from intuition, revelation, conjecture, and reasoning. Absolute empiricism denies existence of a priori knowledge.

USE OF HYPOTHESES IN THE EMPIRICAL METHODOLOGY

Scientific investigation starts with hypothesis formulation. The hypotheses are tested by empirical observation and deductions/inductions are made.

STRENGTH OF THE EMPIRICAL METHODOLOGY

The major strength of the empirical methodology is that it enables rapid growth of knowledge.

WEAKNESSES IN THE USE OF THE EMPIRICAL METHODOLOGY

Biases due to a priori assumptions: A priori assertions or non-assertions, (assertions by default), bias the selection of fields/issues of investigation, formulation of hypotheses, selection of hypotheses for testing, reporting of data, interpretation of data, and use of information.

Limitations of observation by human senses: Empirical knowledge is relativistic and probabilistic. Science can be too arrogant in stating its conclusions as established facts when the observations on which they are based may be wrong. Empiricism depends on human senses. Human senses are limited in their observation and can be deceived; this failure is not cured by use of instruments because they are aids and extensions of the basic human senses. Both empiricists, those who assert that empirical experience is a source of knowledge, and rationalists, those who assert that human reason is source of knowledge, agree that there is no source of knowledge outside the human.