"It was true than normal people couldn't hear Gaspode speak, because dogs don't speak. It's a well-known fact. It's well known at the organic level, like a lot of other well-known facts which overrule the observations of the senses. This is because if people went around noticing everything that was going on all the time, no one would ever get anything done.† Besides, almost all dogs don't talk. Ones that do are merely a statistical error, and can therefore be ignored."