Equation 1 Human = eat + sleep + work+ enjoy Donkey = eat + sleep + work Therefore: Human = Donkey+ enjoy Therefore: Human-enjoy = Donkey . In other words, A Human that doesn't know how to enjoy = Donkey that works. Equation 2 Man = eat + sleep + earn money Donkey = eat + sleep Therefore: Man = Donkey + earn money Therefore: Man - earn money= Donkey . In other words Man who doesn't earn money = Donkey Equation 3 Woman= eat + sleep + spend Donkey = eat + sleep Therefore: Woman = Donkey+ spend Woman - spend = Donkey . In other words, Woman who doesn't spend = Donkey . . . To Conclude: From Equation 2and Equation 3 Man who doesn't earn money= Woman who doesn't spend So Man earns money not to let woman become a donkey! And a woman spends not to let the man become a donkey! So, We have: Man + Woman= Donkey + earn money + Donkey + Spend money Therefore from postulates 1 and 2, we can conclude Man + Woman = 2 Donkeys that live happily together! =))