Enter Immanuel Kant

Hume has to be wrong, because we have clear examples of “synthetic a priori” knowledge:
truths about the world knowable independently of experience, that we see had to be that way:
–Metaphysical principles (e.g. universal causation)
–Euclidean geometry (e.g. Pythagoras’ theorem)
–Newtonian mechanics (e.g. conservation of momentum).