Thomas v. Pangburn
- Party
- Pro Se Litigant
- AI Tool
- Unidentified
Hallucinated Content
Fabricated
- Case Law
Plaintiff cited ten case authorities that did not exist; the Court independently verified the citations were sham despite looking legitimate and ordered an explanation.
False Quotes
- Case Law
Plaintiff falsely quoted Rescue Army to claim courts lack power to determine their own jurisdiction; the case contains no such quote and holds the opposite.
Misrepresented
- Legal Norm
Plaintiff misrepresented the legal rule that a jurisdictional challenge strips a court of jurisdiction; the Court clarified a challenge does not alter jurisdiction and courts may decide their own jurisdiction.
Outcome
Notes
AI UseJerry Thomas filed pro se pleadings citing at least ten fabricated cases. The citations appeared plausible but did not correspond to any real authorities. Despite opportunities to explain, Thomas gave vague excuses about "self-research" and "assumed reliability," without clarifying the sources - suggesting reliance on AI-generated content.Hallucination DetailsTen fake case citations systematically inserted across filingsFabricated authorities mimicked proper citation format but were unverifiable in any recognized databaseThe pattern mirrored known AI hallucination behaviors: fabricated authorities presented with apparent legitimacyRuling/SanctionThe Court dismissed the action with prejudice as a Rule 11 sanction. It emphasized that fake citations delay litigation, waste judicial resources, and erode public confidence. The Court explicitly invoked Mata v. Avianca for the broader dangers of AI hallucinations in litigation and found Thomas acted in bad faith by failing to properly explain the origin of the fabrications.Key Judicial ReasoningCiting fabricated cases (even if resulting from AI use or negligence) is sanctionable because it constitutes an improper purpose under Rule 11. Sanctions were deemed necessary to deter further abuses, with dismissal considered more appropriate than monetary penalties given the circumstances.
Data from Damien Charlotin's AI Hallucination Cases Database.