Ianto is lost for a moment in the other man's train of thought because just for a moment there he had thought...

"I'm sorry," he replies, holding up a hand to suggest they pause whatever conversation John might be trying to have with him, "are you... Idea? Is there something I'm missing here?" Because he's pretty sure that John is having a one-sided conversation with his PDA, and he knows it's been a long day for both of them but.

What the hell is an ancient-friendly format anyway?