Experience stretches no further than limited portions of space and time. In particular, all our experience belongs to the past and present. If we make inferences to the future, then these are inferences, and Hume wants to know the ‘chain of reasoning’ that they employ. The inference from what is true of one limited region of space and time to a conclusion true of different parts of space and time is called inductive inference. What Hume is bothered about has become known as the problem of induction.
