The events and results that constitute the sciences have no common structure, there are no elements that occur in every scientific investigation but are missing elsewhere.
Farewell to Reason. London – New York: Verso, 1987. p.281.
Quote selected by Luca Guzzardi.
Science is not 'irrational'; every single step can be accounted for . . . These steps, however, taken together, rarely form an overarching pattern that agress with universal principles, and the cases that do support such principles are no more fundamental than the rest.
Killing Time. Chicago – London: University of Chicago Press, 1995. p.91.