He smiles as if he knows what she's thinking, though he doesn't. Her flawless composure means that so much more is going on in her head than she's saying purely by default, but if he doesn't need to imagine being in her position (something he lacks enough context for anyway) to guess the line of thought any sensible person would take. His smile is hard and cynical and young, the first two attributes fairly earned and the last one unavoidable, as he is what he is, which is ambiguously twenty-two.

"Not enough. But that's changing." Jason considers his words for a moment, then says, "It's experience that most of them are lacking." His assessment is not without awareness of the hypocrisy in saying that, but he's thinking specifically of urban warfare-like operations, and even if he knew Hermione had fought a goddamn war, he wouldn't think what she went through is directly analogous. And it is a fishing statement, of course. He doesn't expect Vanessza to bite, but it is as transparent and honest as it is calculated.