Contextualists use this to explain why skeptical arguments can be persuasive, while at the same time protecting the correctness of our ordinary claims to "know" things. It is important to note that this theory does not allow that someone can have knowledge at one moment and not the other, for this would hardly be a satisfying epistemological answer. What contextualism entails is that in one context an utterance of a knowledge attribution can be true, and in a context with higher standards for knowledge, the same statement can be false.