Still, it has its limitations.
The other characters still need a motivation to tell it. And a motivation strong enough to tell it at that time. Time is short.
The ignorant character needs to be curious, and at that, have no overriding motivation to let him hold his tongue even when bursting with curiosity. If, for instance, he's afraid of being a nuisance and so being shooed off, that's a good motive to keep his mouth shut. An exhausted or just flat incurious character may not ask either.
Unless of course there's a motive for the knowledgeable characters to blather at the character without being asked. Or even desired to.
And yet information has to come out somehow. . . .