The Wonderland creatures lie less than the people Alice knows at home
The strangest thing about Wonderland is not that it is illogical, but that within its own rules it is scrupulously honest. The Cheshire Cat tells Alice plainly that everyone here is mad, including her, and offers a proof; the Caterpillar refuses to flatter her; Humpty Dumpty tells her exactly what he is doing to language and charges by the word. Nonsense, Carroll seems to suggest, is what you get when you take the conventions away and let people say what they actually mean — and it turns out to be more reliable than most of what passes for sense above ground.