Page updated 4/12/2017. The majority of jobs in the Postal Service are mail carrier and clerk positions. However, like most large corporations the Postal Service requires a broad spectrum of occupations, everything from janitors to engineers, inspectors and administrative occupations of all types.
Determinism suggests that only one course of events is possible, which is inconsistent with the existence of free will thus conceived. As far as we know, this problem was first suggested by Aristotle in the fourth century B.C.E., but it is still a major focus of philosophical debate.
View Full Document. The theory of spontaneous generation was challenged in 1858 by German scientist Rudolf Virchow. He argued for the concept of biogenesis that states that living cells can only arise from preexisting cells, but since he could not offer scientific proof, arguments for spontaneous generation continued.