Justification of beliefs can be spoken of from two points of view. In ordinary life it consists in giving reasons of a kind which will be accepted as good under normal circumstances. I know that my friend is still in the garden, because I was talking with him there a few moments ago, and I have not seen him come out. We can sometimes give reasons for our reasons, but there is a limit to this. For the most part we do not go beyond common-sense considerations.