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AI safety researcher Jacob Coxon claimed on social media that AI development poses more than a 10% chance of causing human extinction, accusing companies like Anthropic and OpenAI of 'gambling with our lives.' The comments have sparked debate among experts about the credibility and implications of such probability estimates. The debate intensified after a former Anthropic employee said he was quitting the company this week, echoing the 'gambling with our lives' framing and raising the question of whether investors should be comfortable holding stock in AI companies whose own researchers express doubts about the safety of their products. The episode has amplified scrutiny of internal dissent within leading AI labs even as investment in the sector continues to surge.