There's no hesitance in her tone as she speaks in her usual monotonous voice. "I spoke using the red truth. Anything I say with that is the absolute truth, there is no need to question it at all whatsoever.

I am not allowed to speak lies with it, and only witches and Game Masters are able to use it freely. Humans are allowed to use the Blue Truth to theorize and ask questions and I would have to reply, but that isn't necessary for this game to continue." At least she's being polite enough to tell him this much.