The human practice of science rests on the assumption that we can reason. This means that the existence of reason cannot be fully accounted for by any type of scientific explanation. For example, when a scientist attempts to address a testable hypothesis or an answerable question, there is an assumption that the results can be rationalised. Scientists also accept that they have the ability to assess the logical validity of a scientific explanation. This obviously assumes that the scientist can use her reason before she performs any science.
