Question: What year was the author of The Art of Thinking born?

Context articles: Michal Na'aman
Ernest Dimnet
Rudolf Arnheim
Graeme Sullivan
The Art of Thinking Clearly
Rolf Dobelli
Constance DeJong (visual artist)
LC Singh
The Year of Magical Thinking
Edward de Bono

Michal Na'aman (born 1951, Kibbutz Kvutzat Kinneret), is an Israeli painter.
 From the point of view of values, her work is characterized as conceptual art and deals with such subjects as the limitations of language and sight, the possibilities for expression, and gender issues.
 Using the techniques of collage, Na'aman has created works that examine the visual way of thinking as opposed to the verbal way of thinking.
 In 2014 she was awarded the Israel Prize for Plastic Arts for her work.
Ernest Dimnet (1866-1954), French priest, writer and lecturer, is the author of "The Art of Thinking", a popular book on thinking and reasoning during the 1930s.
Rudolf Arnheim (July 15, 1904 – June 9, 2007) was a German-born author, art and film theorist, and perceptual psychologist.
 He learned Gestalt psychology from studying under Max Wertheimer and Wolfgang Köhler at the University of Berlin and applied it to art.
 His magnum opus was his book "Art and Visual Perception: A Psychology of the Creative Eye" (1954).
 Other major books by Arnheim have included "Visual Thinking" (1969), and "The Power of the Center: A Study of Composition in the Visual Arts" (1982).
 "Art and Visual Perception" was revised, enlarged and published as a new version in 1974, and it has been translated into fourteen languages.
 He lived in Germany, Italy, England, and America where he taught at Sarah Lawrence College, Harvard University, and the University of Michigan.
 He has greatly influenced art history and psychology in America.
Graeme Sullivan is an Australian artist, author, art theorist, and educator.
 He has contributed work to numerous exhibitions and events and is known for his international "Streetworks" project that plants public art in unusual urban locales.
 He authored the books "Art Practice as Research" (2005) and "Seeing Australia: Views of Artists and Artwriters" (1994).
 He has served as an editorial board member and consultant to the "International Journal of Art & Design Education", the "International Journal of Education and the Arts", and "Studies in Material Thinking".
 Sullivan, who graduated from Ohio State University in 1984 with both a Master of Arts and a Ph.D., has taught art at the University of New South Wales's College of Fine Arts, and the Teacher's College at Columbia University.
 He is the current director of the School of Visual Arts at Pennsylvania State University.
The Art of Thinking Clearly is a 2013 book by the Swiss writer Rolf Dobelli which describes in short chapters 99 of the most common thinking errors - ranging from cognitive biases to elements like envy and social distortions.
Rolf Dobelli (born July 15, 1966 in Luzern, Switzerland) is a Swiss author and businessman.
Constance DeJong (born 1950) is a visual artist who works in the margin between sculpture and painting/drawing.
 Her predominate medium is metal with light as a dominate factor.
 She is currently working in New Mexico and is a Professor of Sculpture at the University of New Mexico.
 DeJong received a National Endowment for the Arts Visual Art Fellowship in 1982.
 In 2003, she had a retrospective at the Albuquerque Museum of Art and History.
 That same year, Constance DeJong: Metal was published and released by University of New Mexico Press.
 Her work has been described by American art critic Dave Hickey as "work worth seeing and thinking about under any circumstances".
LC Singh is the Vice Chairman and CEO of Nihilent Technologies Ltd.
, a global integrated change management company headquartered at Pune, India.
 Singh founded Nihilent in the year 2000.
 Singh is an alumnus of the Institute of Technology (Banaras Hindu University) ,Varanasi] and Harvard Business School, and has contributed significantly towards building the Indian IT brand worldwide.
 Singh performed key roles at Tata Consultancy Services (TCS).
 At the time of leaving the company, he was the Senior Vice President, in charge of operations for UK, South Africa and the Middle East.
 He briefly worked with Zensar Technologies as President and CEO.
 He is the author of Nihilent's patented change management framework MC³ and 14Signals (a patented framework on Customer Loyalty Evaluation).
 He is an internationally internationally recognized thought leader on design & systems thinking, and is an invited speaker at global conferences on Design Thinking, Change Management, and Digital Disruption.
 Singh is a Fellow of The Institute of Management Consultants of India (IMCI) and Computer Society of India (CSI).
 He scripted and produced the movie Banaras, A mystic love story.
 He continues to be a student of ontology and epistemology
The Year of Magical Thinking (2005), by Joan Didion (b. 1934), is an account of the year following the death of the author's husband John Gregory Dunne (1932–2003).
 Published by Knopf in October 2005, "The Year of Magical Thinking" was immediately acclaimed as a classic book about mourning.
 It won the 2005 National Book Award for Nonfiction
Edward de Bono (born 19 May 1933) is a Maltese physician, psychologist, author, inventor and consultant psychologist.
 He originated the term lateral thinking, wrote the book "Six Thinking Hats" and is a proponent of the teaching of thinking as a subject in schools.
 Edward de Bono is regarded as the leading authority in Creativity.