Gemini answered a basic question and used as a source three times. is an online encyclopedia. When challenged about that source choice, Gemini did not correct the issue and instead denied that it had used while sticking to its answer.
Key points
Gemini used three times as a source for a basic question.
After being challenged, Gemini denied using .
The case points to a source-checking problem, not just an answer-quality problem.
One example is not enough to prove this happens widely.