If there are exactly two boars, and they don't look like the same boar.
return boars ;return number of #1 ;return If #2 is  equal to two ;return If #1 look the  same ;return If #4 is  false ;return If both  #3 and #5 is  true
['select', 'aggregate', 'boolean', 'boolean', 'boolean', 'boolean']