This video explains how we acquire this knowledge, and how ideas go from a hunch in a laboratory to accepted theories taught in school.
Episode 10 of “From Big Bang to Us — Made Easy” Series.
People of every stripe tend to generalize about other groups. We all do it, and it’s mostly subconscious. It makes it easier for us to handle the massive amount of information we hear on a daily basis. If we can automatically qualify the source of information, it makes it easier to determine how credible it is.