The history of philosophy is one of (i)____________, in which each philosopher played his part by positing a view that allowed little room for (ii)____________. Rousseau concluded that only in a state of nature is man truly free; Locke claimed that we are all blank slates waiting for the environment to mold us to its fancy; and Hume believed unequivocally that reason is slave to the passions. One need only peruse these writers' works to see that some of these positions were even (iii)____________. A. tidy categories B. nuance C. controversial D. unsettled matters E. dogmatism F. provisional G. abstruse speculation H. empiricism I. irreproachable