Tactical voting: Difference between revisions

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Burying is often discussed in the context of [[Condorcet methods]], where it can be used to create strategic [[Condorcet cycle]]<nowiki/>s. Also see [[later-no-help]] for some examples of burying.

A method that passes both [[later-no-harm]] and [[later-no-help]] is impervious to burying strategy. This because, if a voter prefers candidate C to W, then whether the voter expresses a later preference for W neither increases (later-no-help) nor decreases (later-no-harm) C's chance of winning. [[Instant-runoff voting]] and [[Plurality]] are examples of such methods.

Neither [[later-no-harm]] nor [[later-no-help]] on its own provides complete resistance to burying, however. If a method only passes [[later-no-harm]], it's possible that one particular way of filling in a ballot that expresses a preference for C will help C, thus making C win, while another won't; and it's possible that the former is one where the current winner is buried where the latter is the honest ballot. Similarly, if the method only passes [[later-no-help]], the honest ballot may still harm C whereas the burial ballot does not. If the method passes [[later-no-help]], then truncation works at least as well as burial, but burial may still work.

=== Pushover ===