**Bug Description** Claude Code presented an assumption as a researched fact, and it was not the case. This is very troubling. **Environment Info** - Platform: win32 - Terminal: windows-terminal - Version: 2.1.89 - Feedback ID: 643b3a78-9369-4301-aa53-eaec465e64fb **Errors** ```json [] ```

[Bug] LLM hallucination: Claude presented unverified assumption as factual information

Status Closed — not planned

Reported on v2.1.89

Maintainer reply None cached

Activity 3 comments · opened Apr 1, 2026 · closed May 22, 2026

Bug Description
Claude Code presented an assumption as a researched fact, and it was not the case. This is very troubling.

Environment Info

Errors

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