Objectivity is generally defined as the quality of being free from bias. In philosophy, it pertains to being independently true from one’s own feelings, imagination, beliefs, and/or perceptions.
For instance, in Platonic epistemology, knowledge based on evidence, such as in mathematics, is objective. On the other hand, opinions are subjective. Scientific objectivity, sometimes also referred to as neutrality, is being able to evaluate a systematic and empirical method. Relevant facts are the only ones taken into account. For instance, a theory is proven by testing the hypothesis that flowed from it. An experiment is then conducted to provide a reliable proof.