Elon Musk's social platform X has recently seen new trends, and users have begun to use the AI chatbot Grok developed by xAI for "fact checking". However, artificial fact checkers expressed concerns about this, believing that it could fuel the spread of false information. While Grok provides a credible answer, its accuracy depends on data quality and lacks transparency. In the past, Grok has spread misleading information and caused controversy. Human inspectors stressed that they rely on trusted sources and assume responsibility for multiple parties, and AI cannot completely replace human role in information verification. Despite the continuous improvement of AI technology, its error rate may still be as high as 20%, which may have serious consequences for society.