The given example (Wentworth) was a House of Reps by-election, in which full preferences are required for a vote to be formal anyway. That doesn't affect the t

The given example (Wentworth) was a House of Reps by-election, in which full preferences are required for a vote to be formal anyway. That doesn't affect the tactical voting possibility there - the possibility arose because the Liberal candidate's chances were greatly affected by which of the other two major contenders made it into the final runoff.