A new documentary doesn't disprove Bigfoot — he or she could still be out there! — but it aims to upend the biggest piece of evidence that Bigfoot believers have held onto for 60 years. Now, some of those true believers are becoming skeptics, bringing modern "fake news"-type arguments to social media, or suggesting newly discovered evidence could be an AI-generated hoax. The Patterson-Gimlin film is instantly recognizable. Under a minute long, the grainy 1967 film shows a tall, furry creature