June 4, 1953: Charlie Brown No Longer Exists

There is some kind of logical fallacy at work here, although I can't precisely identify it right now. It's the kind of thing I'd say "Absence of evidence is not evidence of absence" to.

August 11, 1952: Comic strip logic

Well, it makes a kind of sense. Presumably it wouldn't have worked if it hadn't been a toy telephone, or if Lucy had been talking to a person.