"All animals are equal, but some are more equal than others."
All animals
Snowball = Pig('Snowball')
Boxer = Horse('Boxer')
are equal
if Snowball == Boxer:
print True
if Boxer == Snowball:
print True
but some are more equal than others.
(Snowball == Boxer) < (Boxer == Snowball) # True
(Snowball == Boxer) > (Boxer == Snowball) # False