Callie's enthusiasm for lecturing is respectable, if completely unintelligible to him and, by the looks of it, to Iman as well. And even if it's not a very accessible subject, it seems to be a cheering one for her. A chalkboard would have done wonders for that explanation on his end, though. The 'personal reasons' he will let pass for now, even if it is rather difficult to discount his species as a factor entirely. This can probably be blamed on Rassilon in some way.

Iman's questions are pretty spot-on, but he's not gonna waste an opportunity to tack on a couple of his own. "And what does it mean to be a muse of space? Space I get," he waves demonstratively at their current surroundings--Callie had had a point, after all. But what is a muse in this context? "And how is it decided?" All that 'meant to' talk, doesn't sound like she picked it herself.