There are eight levels of wizardry on the Disc…

There are eight levels of wizardry on the Disc; after sixteen years Rincewind has failed to achieve even level one. In fact it is considered opinion of some of his tutors that he is incapable even of achieving level zero, which most normal people are born at; to put it another way, it has been suggested that when Rincewind dies the average occult ability of the human race will actually go up by a fraction.