What Is Fidelity In Westworld?
Short Answer
Fidelity is the test of whether a copied human mind can reproduce the original person's behavior inside a host body.
Connected Story Threads
Dolores recruits Caleb to destroy Rehoboam's control.
His daughter continues resisting Halores's world.
Caleb is treated as an outlier by Incite's system.
Caleb makes the decisive choice to end Rehoboam.
Related Characters, Places, and Concepts
More Questions About Fidelity
The James Delos copies fail because reproducing a person's behavior does not easily create a stable, embodied continuation of that person.
Caleb is captured by Halores, dies as a human, and is repeatedly recreated as unstable host copies in fidelity tests.
Bernard is not literally Arnold; he is a host modeled after Arnold whose identity diverges through new memories, choices, and relationships.
The Forge is Delos's hidden data facility where guest behavior is stored and reduced into readable human code for immortality research.
Delos was using the park to collect guest behavior data and pursue human immortality, not merely to sell immersive entertainment.
Dolores chooses Caleb because he has been controlled by Rehoboam, classified as expendable, and once showed her mercy during military training.