'Westworld' episode 9 finally solves the mystery of Arnold

This post contains spoilers for Westworld Season 1, Episode 9, titled "The Well-Tempered Clavier." Read last week's recap here. In Westworld’s ninth episode, Ford tells Bernard that you can’t rely on humans. But it’s Westworld’s hosts who’ve proved the most unreliable as narrators throughout the season.
As attentive viewers guessed weeks ago, Bernard is Arnold — or rather a version of him built based on memories by Dr. Ford. The clues were all there in e