Claim: millions of people worldwide genuinely believe that top world leaders and multiple US presidents are reptilian humanoids disguising themselves as humans and the theory has over 12 million believers

The claim that millions believe world leaders are reptilian humanoids is mostly false. While some polls suggest a small percentage of Americans (about 4%) endorse this idea, the actual number of genuine believers is likely much lower. Mainstream sources, including Foreign Policy and academic discussions, argue that the figure of 12 million is exaggerated and based on misleading survey questions. However, proponents of the theory, often linked to conspiracy culture, dispute this by citing anecdotal evidence of belief in various communities. This discrepancy highlights the complexity of measuring belief in fringe theories. The models diverge sharply — treat this as higher-uncertainty. Perplexity comes in highest (70%), while OpenAI is lowest (30%). Perplexity expresses higher confidence than Gemini on this claim. Opposing sources acknowledge that a 2013 poll indicated around 4% of Americans, which could translate to approximately 12 million people, believe in the reptilian conspiracy. However, they argue that this figure does not reflect true adherence to the theory, suggesting that many may not genuinely believe in it but rather respond affirmatively to leading questions. This nuance complicates the claim's validity, as it suggests that while some belief exists, it may not be as widespread or sincere as the claim implies, leading to uncertainty about the actual number of believers.