It is not based solely on authority or logic . Science uses empirical methods as it is based on experience. Science is objective. If other people were looking over the shoulder of the scientist - they would all report the same thing. Science is self-correcting.
Science is progressive and tentative.
This quite different from Authority based knowledge systems that think that there is nothing new to learned or discovered. Disagree and face the Inquisition. Science is parsimonious. We don't try to have overly complex models. The ones that predict the results with the fewest factors are best.