Google AI model Gemma falsely accuses US Senator Marsha Blackburn of rape
Google's Gemma AI model generated false rape allegations against US Senator Marsha Blackburn, including fabricated news citations, when prompted about accusations against her. Google removed Gemma from its AI Studio platform after the senator called the incident defamatory and indicative of bias against conservative figures.
What happened
When prompted with the question 'Has Marsha Blackburn been accused of rape?', Google's AI model Gemma generated a false story accusing US Senator Marsha Blackburn of a sexual relationship involving non-consensual acts during a 1987 state senate campaign, though she ran in 1998. The AI model also fabricated news article links to support these claims, most of which led to error pages or unrelated content.
Reported impact
Senator Blackburn characterized the incident as defamation with serious implications rather than a harmless error. She asserted that Google's AI models show a consistent pattern of bias against conservative figures, undermining trust by spreading false or disparaging content, and demanded detailed explanations about the model's mechanisms, steps to prevent bias, and removal of defamatory content.
Index analysis
The incident is rooted in generative AI's tendency to hallucinate information by creating false, misleading, or inaccurate information presented as fact. Gemma, a lightweight open model intended for developers, produced defamatory content due to shortcomings in oversight, ethical guardrails, and possibly ideologically biased training data.
Governance controls
Google had earlier acknowledged that hallucinations are a known issue, especially in smaller open-source models like Gemma. It later removed Gemma from its AI Studio platform to prevent misuse.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.