Finch listens, his head tilted to the side, absorbing this, and absorbing the young man's delivery as well. He's not reluctant to talk about his methods, then. Pleased, maybe? Harold himself had always been pleased, when Nathan had inquired as to what he was doing with his computers.

He notes that little wry twist to the mouth, as well, and has to stop himself from snorting. It would hardly be politic. There's a touch of aggrieved bitterness there, isn't there? Huhmmn.

"Oh, it's still rather impressive," Finch says after two seconds' consideration. "Observing patterns is a skill. One I must assume you've practiced a great deal, in order to be able to draw conclusions like that. But you must be aware a stranger might not-- welcome having a painful bit of their past so casually discussed?"

Finch's voice is even now, not the hard fear of earlier. If there is a hyper-observant deductive genius around, Finch would rather the person were.... cultivated not hostile, at the least.