Your example seems more like an example of people not having a consistent mental model of what words means. A typical person would probably say that "a working-

Your example seems more like an example of people not having a consistent mental model of what words means. A typical person would probably say that "a working-age person without a job is unemployed" and "a full-time student or a stay-at-home mom or someone who retired early are not unemployed" are both true statements, but the two statements are contradictory. A statistician cannot possibly come up with a definition of unemployment that matches the colloquial understanding of what unemployment means.