Not a complete idiot. My, but they must dry harder.

"Frisk and I have things well in hand." An evasive answer, if not simply because they have led him to believe that they do in fact remember him - and others - with a disturbing ease. They've grown to know other children as well. Interesting.

Though not, on second thought, surprising. Children are preferable to adults. Their thoughts are much easier to glean, and much easier to overpower should the situation arise.