what are replicants in blade runner

Replicants are fictional bioengineered humanoids featured in the "Blade Runner" film franchise. They are genetically engineered and created artificially, designed to serve as slave labor in a variety of roles. In the movies, they are portrayed as looking like regular people but with para- physical capabilities, and they are considered second-class citizens by society at large. Replicants can be detected by means of a fictional test called the Voight-Kampff test, which measures their emotional responses to differentiate them from humans. Failing the test leads to execution, euphemistically referred to as "retiring." Several models of replicants were produced, with the first seen model, the Nexus-6, having a four-year lifespan. The 2017 sequel, "Blade Runner 2049," further explores the nature of replicants, depicting them as genetically engineered humans tweaked to make them less likely to resist human control