It's hard to argue like this, for him, to not let the million random thoughts that normally crop up answer in a bizarre stream-of-consciousness ramble, rather than gathering up a solid, concrete response. Mostly he's using impressions of what he's getting at, which seems to be working pretty well so far.

Her evasion is noted, and a promise given to follow up on that later when he has a more ready vocabulary.

You're going to lull me to sleep in the middle of the common room. He warns her, though he will allow that this feels wonderful. It's not exactly helping him eat his meal speedily, however.