Mercerism is the religion in Do Androids Dream of Electric Sheep that was used in order to blend the concept of a life-death-rebirth deity with the values of unity and empathy. In the religion of Mercerism empathy is very important and a lot of it deals with empathy. Empathy simply means putting oneself in another's shoes.
Mercerism also means a statement to identify something stupid, ridiculous, and/or way off the actual meaning as said by the notorious Anthony mercantile. In the book Mercerism has a different meaning as what it really means.

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