each other by cause and effect relation so we want to know what's the cause of cancer and it won't do to say well cancer is just one of those things it doesn't have any causes we won't accept that because our background presupposition is things need a causal explanation and the background presupposition that makes sense of true belief is the idea that there's a way that things are that's independent of how we represent and how they are now sometimes that's not the case sometimes our beliefs are so enjoyed they're so