Over several months, “The Weekly” embedded with a team of creative young engineers developing the perfect deepfake — not to manipulate markets or game an election, but to warn the public about the dangers of technology meant to dupe them. The team picked one of the internet’s most recognizable personalities, the comedian and podcaster Joe Rogan, who unwittingly provided the inspiration for the engineers’ deepfake moonshot. Can they perfect the technology before someone else pulls off the ultimate scam? Or do they risk introducing a tool that can forever be used to cloud the truth?