Smith notes that it may be impossible to unequivocally prove something with one hundred percent accuracy; rather, scientists seek probability.

The term theory is often misconstrued: Smith states that "theories always explain facts." Moreover, there is no clear demarcation between a theory and a hypothesis. Theories are basically broad hypotheses. Laws, on the other hand, are more restrictive and are often derived from theories. The practice of science entails experimentation as well as presentation to the scientific community. When the research is presented to other scientists, it is usually done so through peer-reviewed journals. Often other scientists will critique and critically evaluate the scientific experiment and attempt to replicate it. When the experiment has been replicated the hypothesis may become part of the canon of established science and from there, common knowledge.

Because science can only deal with what is observable and measurable, it can not apply to philosophy, aesthetics,...
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