David Hume's An Inquiry Concerning Human Understanding In An Inquiry Concerning Human Understanding, David Hume demonstrates how there is no way to rationally make any claims about future occurrences. According to Hume knowledge of matters of fact come from previous experience. From building on this rationale, Hume goes on to prove how, as humans we can only make inferences on what will happen in the future, based on our experiences of the past. But he points out that we are incorrect to believe that we are justified in using our experience of the past as a means of evidence of what will happen in the future