Wittgenstein got stuck when it came to analyzing propositions about the colors of objects. Take four propositions about the color of some particular object A. These propositions aren’t logically independent from each other, so at most one of them could be an elementary proposition. But then the worry is that once we determine that one of these four propositions is elementary, we’ll have no way to analyze the three leftover propositions, since they won’t each be truth functions of the elementary color proposition. A lot of people think that this problem motivated Wittgenstein to abandon the central project of the Tractatus.
Continuing the End Times series, Richard Marshall interviews Sarah Moss.