Cecil faces Ianto more squarely in something like shock, gestures run a bit wild. "Oh no, I would never do that. Once she clarified about time travel legality, I mean," he stops himself, not wanting to get off track. "I definitely wasn't trying to be rude. She made me promise not to acknowledge her existence," he hastens to explain. What a terrible misunderstanding! How could Cecil have made such an awful misstep. He would never be discriminatory against non-existents. But, well, it's important to not acknowledge the existence of some things, sometimes very stridently and often. "The TARDIS is very nice, she let me out of the library almost immediately, and gave me this coat, so I wouldn't be cold. The least I can do is deny her existence properly."