Science as the systematic study of man and his environment based on the deductions and inferences which can be made, and the general laws which can be formulated, from reproducible observations and measurements of events and parameters within the universe. Something is scientific when it, pertains to science or the sciences, occupied or concerned with science, regulated by or conforming to scientific principles of exact science (a scientific method; systematic or accurate). This is forms the basis of many science and health science disciplines, including those for nursing. It is the basis of standards for Evidence Based Practice (EBP) which are included as a requirement in the competency documents for nursing professionals.