I can't understand why you people argue about that point to begin with.
She might've thought Kurono and Gantz read her mind or she might've said Kurono off-screen (a bit more likely).
In the end it doesn't matter what happened. We could learn that Gantz can read your mind. But what good will this information do us? It would've helped the panda in bringing Izumi back if he was still alive, but he isn't. And we can pretty much expect that there won't be another situation where Gantz will use this ability.
So this has no impact on the future of the story whatsoever and isn't important.
The outcome is what's important.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"