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Description
Introduction to Logic: And to the Methodology of Deductive SciencesFirst published in Polish in 1936, this classic work was originally written as a popular scientific book one that would present to the educated lay reader a clear picture of certain powerful trends of thought in modern logic. According to the author, these trends sought to create a unified conceptual apparatus as a common basis for the whole of human knowledge. Because these new developments in logical thought tended to perfect and sharpen the
First published in Polish in 1936, this classic work was originally written as a popular scientific book -- one that would present to the educated lay reader a clear picture of certain powerful trends of thought in modern logic. According to the author, these trends sought to create a unified conceptual apparatus as a common basis for the whole of human knowledge.Because these new developments in logical thought tended to perfect and sharpen the deductive method, an indispensable tool in many fields for deriving conclusions from accepted assumptions, the author decided to widen the scope of the work. In subsequent editions he revised the book to make it also a text on which to base an elementary college course in logic and the methodology of deductive sciences. It is this revised edition that is reprinted here.
Part One deals with elements of logic and the deductive method, including the use of variables, sentential calculus, theory of identity, theory of classes, theory of relations and the deductive method. The Second Part covers applications of logic and methodology in constructing mathematical theories, including laws of order for numbers, laws of addition and subtraction, methodological considerations on the constructed theory, foundations of arithmetic of real numbers, and more. The author has provided numerous exercises to help students assimilate the material, which not only provides a stimulating and thought-provoking introduction to the fundamentals of logical thought, but is the perfect adjunct to courses in logic and the foundation of mathematics.
Binding Type: Paperback
Publisher: Dover Publications
Published: 03/27/1995
ISBN: 9780486284620
Pages: 272
Weight: 0.64lbs
Size: 8.44h x 5.43w x 0.53d
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★★★★★ 5
Great Sunscreen
Love this sunscreen. What I like most is that it goes on very dry with zero greasy feeling or shine. The sunscreen is also scent free. I’ve seen several review where purchases stated that they received expired product. Mine arrived in January 2023 and expires February, 2024. I highly recommend this product.
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Reviewed in the United States on March 6, 2023
★★★★★ 5
A good product
I’m very satisfied with this product. The quality is excellent, it arrived on time, and it works exactly as described. Definitely worth the purchase and I would highly recommend it to others.
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Reviewed in the United States on October 4, 2025
★★★★★ 5
Doesn’t stain clothes and lightweight
Something that always bothers me about sunscreen is how it stains clothing. I did not have that problem with this sunscreen. It was lightweight. It only had a very mild gritty feeling after having it on for over 8 hours and sweating a ton. Best sunscreen out there right now!
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Reviewed in the United States on July 22, 2023
★★★★★ 5
The only sunscreen that does not break me out!
I have oily to normal skin with general sensitivity. The breakout-free Neutrogena sunscreens are the only ones that don't break out my face and body, even with reapplication. I have repurchased several times and highly recommend. There is only a slight white cast left over but here's my hack for no whitecast: apply a small amount to fingers and rub to warm, pat to cover face, then rub to blend in, then repeat with another layer. Perfect for underneath makeup, I usually put it on before primer.
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Reviewed in the United States on December 5, 2022
★★★★★ 4
Less White Cast
A little of this sunscreen goes a long way and when not slathered on, the white cast is minimal if at all. If I reapply every two hours—as instructed by every sunscreen label I have ever read—the white does become more visible by the third or fourth application but I combat that by mixing with a sheer moisturizer. There are times when I see white lines on my neck because of the sunscreen, so I just rub those in and they re-dissipate. Also, this sunscreen is noncomedogenic, oil-free, and as an added bonus, is rated at 2 in EWG’s sunscreen guide.
Item: Neutrogena Clear Body Breakout-Free Liquid Sunscreen Lotion for AcneProne Skin, Oil Free Sunscreen, Broad Spectrum SPF 30, Oxybenzone Free, Fragrance Free, Non Comedogenic, Unscented, 5 Fl Oz
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Reviewed in the United States on February 18, 2024
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