David Hume Origins and Association of Ideas

1. Perceptions

1.1. Impressions

1.1.1. Of Sensations (external)

1.1.2. Of Reflection (internal)

1.2. Ideas

1.2.1. From Memory

1.2.2. From Imagination

1.2.2.1. From Fancy

1.2.2.1.1. Source of fantasies, superstitions, and bad philosophy.

1.2.2.2. From Understanding

1.2.2.2.1. Involving Relations of Ideas

1.2.2.2.2. Involving Matters of Fact