James' mental probe wasn't met with anything at all. Not a slammed mental portcullis, not an impassable mental wall. Nothing. It was as if he was trying to use Legilimens on a Doppelganger.
It was like a blank mental screen, perfect for the projection of any memories Snape might want to use to misdirect or confuse. But the projectionist hadn't bothered to come to the theatre.
Snape's eyes narrowed to slits. "In what way does your attempting to practice Legilimency do one single damn thing except increase your vulnerability, when instead you need to learn to Occlude?"