Viewing situations in absolute terms with no middle ground or gray areas. It describes thinking that categorizes things as completely right or wrong, good or bad, with no recognition of complexity or nuance.
While the literal contrast between black and white has been used symbolically for centuries, the metaphorical use meaning 'clear-cut' or 'absolute' became prominent in the 19th century. It draws from the visual clarity of black text on white paper and the traditional association of black with evil and white with good.
This phrase reveals a fundamental cognitive bias called 'dichotomous thinking' that helped our ancestors make quick survival decisions but often oversimplifies modern complexities. Interestingly, cultures that historically had fewer color terms tend to use similar binary metaphors, suggesting this is a universal human tendency.
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