Joshua Barbeau was 26 when his fiancee, Jessica Pereira, died from a rare liver disease. Eight years later, still grieving, he turned to Project December, a website that allowed him to text with an artificial intelligence simulation of Jessica. The Chronicle's Jason Fagone talks to host Cecilia Lei about his story about love and A.I., and Joshua Barbeau discusses how a chatbot helped him cope with loss. | Unlimited Chronicle access: sfchronicle.com/pod

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