Eleven deflates a bit, having failed to successfully distract the man. No apparent recognition of any of those phrases means he might have to truly consider the alternative.

"Birthmark," he supplies with a faint smile, then hesitates as he searches for a base explanation for someone that wouldn't know what his title means. That in itself is something of a relief, if he's honest. "It- it represents a power I was born with. But ah, that doesn't mean anything now."