CP2 claims that we are not justified in denying the skeptical hypothesis—in other words, that we are not justified in believing that we are not being deceived. What arguments can be given for CP2? It is tempting to suggest something like this: The skeptical scenarios are developed in such a way that it is assumed that we could not tell that we were being deceived. For example, we are asked to consider that there is an Evil Genius “so powerful” that it could (1) make me believe that there were ha