Law of resemblance According to Hume, the ten- dency for our thoughts to run from one event to similar events, the same as what others call the law, or principle, of similarity.
Locke, John (1632–1704) An empiricist who denied the existence of innate ideas but who assumed many nativistically determined powers of the mind. Locke distinguished between primary qualities, which cause sensations that correspond to actual attributes of physical bodies, and secondary qualities, which cause sensations that have no counterparts in the physical world. The types of ideas postulated by Locke included those caused by sensory stimulation, those caused by reflection, sim- ple ideas, and complex ideas, which were composites of simple ideas.
Mach, Ernst (1838–1916) Proposed a brand of pos- itivism based on the phenomenological experiences of scientists. Because scientists, or anyone else, never expe- rience the physical world directly, the scientist’s job is to precisely describe the relationships among mental phe- nomena, and to do so without the aid of metaphysical speculation.