We can never prove anything. The data will lead us close to the truth if we are rigorous. So, we should remain unbiased and objective toward whatever outcome. With enough testing and enough samples, we will have a clearer understanding of what may possibly be going on. We can never be certain. That is a jaw dropping revelation even to graduate students. The more we know the more we realize what we don't know.

In business or war if the research findings are "Reject" (there is a difference) for eight consecutive experiments, they should go into production. Drug research for humans requires 5 years and large samples. In business we do not often have that much time nor can we take that many samples. So, we take small samples randomly and test often to see if we are on the right track.

Can you think of other businesses that require constant monitoring through research?