-- Balance 4 pills against the other 4. The poison pill is one
of the heavier 4.
Put the lighter 4 off to the side.
-- Balanse 2 pills against the other 2. The poison pill is one
of the heavier 2.
Put the lighter 2 off to the side.
-- Balance 1 pill against the other 1. The poison pill is the
heavier one.