Scientists' duty is to study the basics and rules of how this world functions. This is why since the ancients time scientist created theories or conclusions as a based-line to help guide us for more understanding of this world. Many so-called conclusions and theories help us in many technological breakthroughs. However not all of the previous conclusions and theories were fully reliable, some may have issue such as , the tools at the time weren't advance enough , lack of knowledge for certain principles. That is why in my opinion scientist should still reanalyze previous conclusions to refine the knowledge that we have.