[The idea of how useful that must be comes out on an excited breath, almost a gasp. It sounds like something the Doctor would say he can do, without any proof to back it up. She's the one doing the staring then, trying so hard to figure him out.]
How?
[It could be a simple matter of knowing body language. She can tell when someone's lying to her well enough based off that. Maybe it's the same for him.]
no subject
[The idea of how useful that must be comes out on an excited breath, almost a gasp. It sounds like something the Doctor would say he can do, without any proof to back it up. She's the one doing the staring then, trying so hard to figure him out.]
How?
[It could be a simple matter of knowing body language. She can tell when someone's lying to her well enough based off that. Maybe it's the same for him.]
Tell me, and I'll share all of my doubts.