Logical evidence that Deckard is human Replicants are created for a purpose and since they have a limited lifespan replicants have limited time to switch careers Thus IF Deckard is a replicant he must have been created TO BE a hunter and deactivator of illegal replicants The fact that he is physically inferior to the replicants he s supposed to apprehend makes no sense Thus it only follows logically that Deckard can not be a replicant