Abstract:A new kind of skepticism about philosophy is articulated and argued for. The key premise is the claim that many of us are well aware that in the past we failed to have good responses to substantive objections to our philosophical beliefs. The conclusion is disjunctive: either we are irrational in sticking with our philosophical beliefs, or we commit some other epistemic sin in having those beliefs.The new kind of skepticism described below makes me think that many of my most interesting beliefs are false and should be given up. Unlike traditional skepticism it's a kind of skepticism that is worrisome, as it points to falsehood (and not merely lack of knowledge) and says that we have to change our intellectual lives. And it starts with the most innocent and wise observations: for just about any philosophical view you once endorsed, if you are an experienced philosopher then you are fully aware that back when you endorsed it there were serious objections to it that you couldn't knock down.My goal in this essay is merely to set out the problem: since the problem is new, it would be over the top to think I have a solution to it. In the next section I start with an informal presentation of the argument, since it's novel and opinions may differ on how best to make it precise. Then I present one way to make the argument precise. Then I defend the premises. After that I consider the untoward epistemic consequences of philosophers who truly escape the argument's skeptical snare. I end the paper with remarks on applying the skeptical argument to areas other than philosophy.