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Francis has become a recurring favorite to show in incongruous situations, such as riding a motorcycle and attending Burning Man, in A.I.-generated images.

Human eyes — and even technology — often struggle to identify images created by artificial intelligence. Experts fear that may hasten an erosion of trust in media, in government and in society.

Twitter and the social media platform Discord have policies about how they would handle the material. But those rules have gray areas and can be unevenly enforced.

Increasing attention to suspicious-seeming transactions has led to some people suddenly losing access to their bank accounts. The reasons are often a mystery.

Technology companies were once leery of what some artificial intelligence could do. Now the priority is winning control of the industry’s next big thing.