Legal fictions and the argument of analogy are two different kind of instruments the legislative and judicial power make use of, reasoning in a distinguished way to solve certain problems. In this essay both the instruments will be compared with regard to four criterias derived from Aristotle’s theory of four causes: subject matter, form, origin & end as well as telos & function. In the end it will be concluded that the argument of analogy is indeed stranger than (legal) fictions.