A confident tone is not proof

An invented booking address can arrive in the same polished sentence as the correct event time.

Models can express uncertainty. Research has also found useful self-evaluation in some settings, with weaker results when tasks change. That is different from assuming that an ordinary confident answer must be correct.

Changing "the event starts at two" to "I am certain the event starts at two" adds emphasis. It adds no source.

Ask what supports the claim. A confirmed organiser's brief gives you something to compare against. Another assurance from the model does not independently confirm it.

You can use the model to help review a draft. When accuracy matters, anchor that review in evidence beyond its own say-so.