 Of course, all sorts of seemingly rational everyday reasoning violates Monotonicity. If Sophia is told that her thermometer reads 85° Fahrenheit, she would be justified in concluding that it is not too cold to have dinner in the garden. If she then learns that her thermometer was moved above the oven where she is boiling her pasta, she might retract her conclusion. That does not mean that her original inference was unreasonable or irrational. Non-monotonicity is simply unavoidable in ordinary human contexts. Inductive inference is famously non-monotonic. Ethical and legal reasoning is similarly shot through with non-monotonicities (Ross, 1930 and Ullman-Margalit, 1983).