“you can’t use logic on human behavior.”

— Jeff Lindsay, book Dearly Devoted Dexter

Source: Dearly Devoted Dexter

Last update June 3, 2021. History

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American playwright and crime novelist Jeffry P. Freundlich 1952

Carol Plum-Ucci (1957) American writer

Source: What Happened to Lani Garver

“LOGIC The principle governing human intellection. Its nature may be deduced from examining the following propositions, both of which are held by human beings to be true and often by the same people: “I can’t so you musn’t,” and “I can but you musn’t.””

John Brunner book Stand on Zanzibar

the happening world (15) “Equal and Opposite”
Stand on Zanzibar (1968)

“Even though principles of rationality seem as often violated as followed, we still cling to the notion that human thought should be rational, logical, and orderly. Much of law is based upon the concept of rational thought and behavior. Much of economic theory is based upon the model of the rational human who attempts to optimize personal benefit, utility, or comfort. Many scientists who study artificial intelligence use the mathematics of formal logic—the predicate calculus—as their major tool to simulate thought. […] Human thought is not like logic; it is fundamentally different in kind and spirit. The difference is neither worse nor better. But it is the difference that leads to creative discovery and to great robustness of behavior.”

Donald A. Norman book The Design of Everyday Things

Source: The Design of Everyday Things (1988, 2002), Ch. 5, pp. 114–115.

“Evolution’s logical, unlike religion. Even the Church will agree with that. You have to take religion on faith and you can’t test it by common sense.”

Lester del Rey (1915–1993) Novelist, short story writer, editor

Source: The Eleventh Commandment (1962), Chapter 8 (p. 72)

“The human mind gets used to strangeness very quickly if it does not exhibit interesting behavior.”

Dan Simmons book The Rise of Endymion

Source: The Rise of Endymion (1997), Chapter 12 (p. 227)

“Institutions are human behavior, and they are, therefore, to be explained by the characteristics of that behavior.”

George C. Homans (1910–1989) American sociologist

George C. Homans (1962), "Autobiographical introduction", in: Sentiments & activities; essays in social science https://archive.org/stream/sentimentsactivi00homa#page/34/mode/2up, p. 35

“Logic is not concerned with human behavior in the same sense that physiology, psychology, and social sciences are concerned with it. These sciences formulate laws or universal statements which have as their subject matter human activities as processes in time. Logic, on the contrary, is concerned with relations between factual sentences (or thoughts). If logic ever discusses the truth of factual sentences it does so only conditionally, somewhat as follows: if such-and-such a sentence is true, then such-and-such another sentence is true. Logic itself does not decide whether the first sentence is true, but surrenders that question to one or the other of the empirical sciences.”

Rudolf Carnap (1891–1970) German philosopher

Rudolf Carnap (1937) cited in: Irving J. Lee (1967) The Language of Wisdom and Folly: Background Readings in Semantics. International Society for General Semantics, p. 44

“Classifying thoughts, feelings and behaviors as diseases is a logical and semantic error, like classifying whale as fish.”

Thomas Szasz (1920–2012) Hungarian psychiatrist

“One can’t expect logic from males; they think with their testicles and act from their emotions.”

Robert A. Heinlein book The Number of the Beast

Source: The Number of the Beast (1980), Chapter XXXIX : Random Numbers, p. 385

“Preachers have created for us patterns of behavior unattainable for humans, they then left us chasing them as if we were chasing a dream”

Ali Al-Wardi (1913–1995) Iraqi sociologist

“you can’t use logic on human behavior.”

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