 Carnap also needs to consider the possibility that Heidegger’s sentences are illuminating nonsense. After all, Carnap was patient with the cryptic Wittgenstein. In the Tractatus, Wittgenstein speaks like an oracle. He even characterized his carefully enumerated sentences as rungs in a ladder that must be cast away after we have made the ascent and achieved an ineffable insight. And Wittgenstein meant it, quitting philosophy to serve as a lowly schoolmaster in a rural village.