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Perspicacity (also called perspicaciousness) is a penetrating discernment (from the Latin perspicācitās, meaning throughsightedness, discrimination)—a clarity of vision or intellect which provides a deep understanding and insight. It takes the concept of wisdom deeper in the sense that it denotes a keenness of sense and intelligence applied to insight.
Another definition refers to it as the "ability to recognize subtle differences between similar objects or ideas". It has also been described as a deeper level of internalization. Perspicacity is different from acuity, which also describes a keen insight, since it does not include physical abilities such as sight or hearing.
In 17th-century Europe, René Descartes devised systematic rules for clear thinking in his work Regulæ ad directionem ingenii (Rules for the direction of natural intelligence). In Descartes' scheme, intelligence consisted of two faculties: perspicacity, which provided an understanding or intuition of distinct detail; and sagacity, which enabled reasoning about the details in order to make deductions. Rule 9 was De Perspicacitate Intuitionis (On the Perspicacity of Intuition). He summarised the rule as
Oportet ingenii aciem ad res minimas et maxime faciles totam convertere, atque in illis diutius immorari, donec assuescamus veritatem distincte et perspicue intueri.
We should totally focus the vision of the natural intelligence on the smallest and easiest things, and we should dwell on them for a long time, so long, until we have become accustomed to intuiting the truth distinctly and perspicuously.
In his study of the elements of wisdom, the modern psychometrician Robert Sternberg identified perspicacity as one of its six components or dimensions; the other five being reasoning, sagacity, learning, judgement and the expeditious use of information. In his analysis, perspicacity was described as
...has intuition; can offer solutions that are on the side of right and truth; is able to see through things — read between the lines; has the ability to understand and interpret his or her environment.— Robert J. Sternberg, Wisdom: its nature, origins, and development
To quote an Academy brochure, the quality most needed by a scientist-astronaut is "perspicacity." He must, the brochure says, be able to quickly pick out, from among the thousands of things he sees, those that are significant, and to synthesize observations and develop and test working hypotheses.
Being perspicacious about other people, rather than having false illusions, is a sign of good mental health. The quality is needed in psychotherapists who engage in person-to-person dialogue and counselling of the mentally ill.
The artist René Magritte illustrated the quality in his 1936 painting Perspicacity. The picture shows an artist at work who studies his subject intently: it is an egg. But the painting which he is creating is not of an egg; it is an adult bird in flight.
- Neuro-linguistic programming
- Organizational politics
- Stress management
- Time management
- Em Olivia Bevis (1989), Curriculum Building in Nursing, p. 134, ISBN 978-0-7637-0941-9
- Strutzel, Dan (2018-10-09). Vocabulary Power for Business: 500 Words You Need to Transform Your Career and Your Life: 500 Words You Need to Transform Your Career and Your Life. Gildan Media LLC aka G&D Media. ISBN 9781722521158.
- Lyles, Dick (2010). Pearls of Perspicacity: Proven Wisdom to Help You Find Career Satisfaction and Success. Bloomington, IN: iUniverse, Inc. pp. xiv. ISBN 9781450244794.
- René Descartes, edited and translated by George Heffernan (1998), "Regula IX De Perspicacitate Intuitionis", Regulæ ad directionem ingenii, Rodopi, p. 122, ISBN 978-90-420-0138-1
- Robert J. Sternberg (1990), Wisdom, Cambridge University Press, pp. 146, 157, ISBN 978-0-521-36718-9
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- "On Seeing Clearly and Thriving: Interpersonal Perspicacity as Adaptive (Not Depressive) Realism (Or Where Three Theories Meet)", Journal of Social and Clinical Psychology, 25 (5): 542–564, May 2006, doi:10.1521/jscp.2006.25.5.542, ISSN 0736-7236
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- Baumeister, Andrea T.; Horton, John (1996). Literature and the Political Imagination. London: Routledge. p. 13. ISBN 0415129141.
- Sheng, Andrew (2009). From Asian to Global Financial Crisis: An Asian Regulator's View of Unfettered Finance in the 1990s and 2000s. Cambridge: Cambridge University Press. p. 395. ISBN 9780521118644.
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