#
# Given that robots include (see robots.alf): 
#   - those whose name matches /[Bb]ot/ 
#   - those who request robots.txt
#
# Who are cheaters, that is, those who request robots.txt but are not
# named /[Bb]ot/ ?
# 
(minus \
  (project (restrict :combined, lambda{ path       =~ /robots.txt/ }), [:user_agent]),
  (project (restrict :combined, lambda{ user_agent =~ /[Bb]ot/     }), [:user_agent]))