1973 Kahneman and Tversky; and inverting “Despite” and “Because”

Unravelling base rate fallacy is often counterintuitive, and thus a system which employs it can be assisted by human behavior and a delusion of “common sense.” Base rate gives us a probability from the outset, but irrelevant characteristics shared between two populations nonetheless provoke different and unjustifiable valuations attached to one but not the other population. For example, below, “evidence” of marital status does not distinguish Lawyers from Engineers. Truly distinguishing evidence, such as an authenticated university diploma, would help and would not be “worthless.” However, barring such uniquely distinguishing information, “evidence” can be shared or unshared between two populations. Or, to expose the same problem with different words, a characteristic can be sufficiently pervasive throughout both populations. In the text below, one who neglects the fallacy may object that Dick was rejected as a lawyer despite the fact that he shares characteristics with lawyers, even though the odds are clear that Dick is probably an engineer.  One who embraces base rate would counter that Dick is rejected as a lawyer, because he merely shares characteristics with lawyers. (The illustration, rounded-box outline for text, and black box comments are mine.)

1973 Kahneman and Tversky Base Rate fallacy; "Judgement under Uncertainty: Heuristics and Biases" -- inverting “Despite” and “Because”