Please talk slower.

Vergil's pretty much an open book, assuming they ever interact. Roger probably is too, come to think of it. There's stuff he doesn't talk about but the only way he'd be able to keep anybody out of his thoughts would be if he were actively on his guard about it. (And he'd probably do it by filling his head with obnoxious Christmas novelty songs, the way he did when Dirge was in Soundwave's body.)