  Much of the theoretical work on strategic voting makes strong assumptions
about what voters know about the voting situation. A strategizing voter is
typically assumed to know how other voters will vote and to know the rules of
the voting method. A growing body of literature explores strategic voting when
there is uncertainty about how others will vote. In this paper, we study
strategic voting when there is uncertainty about the voting method. We
introduce three notions of manipulability for a set of voting methods: sure,
safe, and expected manipulability. With the help of a computer program, we
identify voting scenarios in which uncertainty about the voting method may
reduce or even eliminate a voter's incentive to misrepresent her preferences.
Thus, it may be in the interest of an election designer who wishes to reduce
strategic voting to leave voters uncertain about which of several reasonable
voting methods will be used to determine the winners of an election.
