It's not so bad if you stick to some of the harder, or at least more rigidly defined liberal arts areas. Philosophy, Classics, and History (if you pick your way carefully) can be among the less squishy. If you go back to things that are at least 100, 150 years old, but not so far back that written records no longer exist, you can avoid most of the worst excesses of critical theory and similar politicized stances.