Edited sentence: A strong argument against voters voting tactically is that elections have effects beyond the immediate election.For example in FPTP you are only likely to vote tactically for one of the front runners if you consider there to be a big difference in the quality of those two candidates (a large pivot utility).He would do this so that next time other people will be less likely to vote tactically for that candidate.So the votes that each candidate picks up ends up taking into account the utilities as well as the rankings.Under FPTP a voter might vote for a candidate he thinks will certainly lose