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Description
Frege ExplainedWhat is the number one? How can we be sure that 2+2=4? These apparently ssimple questions have perplexed philosophers for thousands of years, but discussion of them was transformed by the German philosopher Gottlob Frege (1848 1925). Frege (pronounced Fray guh)believed that arithmetic and all mathematics are derived from logic, and to prove this he developed a completely new approach to logic and numbers. Joan Weiner presents a very clear outline of
What is the number one? How can we be sure that 2+2=4? These apparently ssimple questions have perplexed philosophers for thousands of years, but discussion of them was transformed by the German philosopher Gottlob Frege (1848-1925).Frege (pronounced Fray-guh)believed that arithmetic and all mathematics are derived from logic, and to prove this he developed a completely new approach to logic and numbers. Joan Weiner presents a very clear outline of Frege's life and ideas, showing how his thinking evolved through successive books and articles.
Binding Type: Paperback
Publisher: Open Court
Published: 02/01/2005
ISBN: 9780812694604
Pages: 176
Weight: 0.60lbs
Size: 8.98h x 6.12w x 0.52d
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4.8 ★★★★★
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Product Reviews
★★★★★ 3
Ehh??
Didn't work for my on my 17 hyundai accent with 90k on it.
I poured the whole bottle in with a half tank of gas. And went for a 3 day italian tune up.... no dice.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Works great
Follow instructions and it will work. Had a p420 code, caught it early used this. No more code and passed emissions
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Nice Filter Wrench for my Volvo V70XC!
Size: 86mm x 16
I was needing a filter wrench for my 2001 Volvo V70XC and couldn't find anything that fit from the local auto parts stores. Not knowing what to expect, I took a chance on this one since most of the reviews were 5 star and the price was exceptional.
When I received it, I was quite pleased with the construction and finish. I have a brand new oil filter housing for my Volvo (since the one currently on my car is chewed up from the former owner using slip-jaw pliers or something on it) and the fit is perfect! I have worked as a mechanic my whole life (aircraft & automotive), and spent a couple of years as a technician at an automotive dealership and I can say that the tool looks like it is designed for heavy-duty use.
The stamped steel housing is thicker than those found in local auto parts stores and the drive adapter has a thick arc welded bead along the inside of the tool. So, it appears to be made to hold up to some fairly heavy torque. Although the product description states that it is 1/2", the drive adapter is actually made for direct attachment to a 3/8" drive. Perhaps this error stems from the fact that they offer a much larger wrench (118-131mm) and this is a more accurate description of their other offerings.
The 3/8" drive adapter works perfectly and a 21mm socket fits nicely on the external hex. Fits with SAE sizes are a mixed bag, though. I was able to attach a 13/16" 12-pt. box-end wrench, but not the opposing open-end. A similarly sized 13/16" 6-pt. socket was extremely tight, so I wouldn't recommend this size and would just go with the 21mm if you had to use the external hex. Otherwise, just use the 3/8" drive adapter for easiest use of this tool. The adapter also incorporates ball detents on all four sides of the internal 3/8" drive, so your ratchet or extension won't easily fall off while in use.
Since this tool is made for oil filter removal & installation, I'm sure that it will deliver as promised. I'll post an update after my next oil change and I get a chance to use it and install the new filter housing I have.
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Reviewed in the United States on January 25, 2014
★★★★★ 5
Makes the job easy
Size: 88.5mm x 16
Worked well for removing and installing the oil filter housing.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Great tool
Size: 88.5mm x 16
Fit perfectly. Great tool. Made changing oil fast and easy .
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Reviewed in the United States on November 28, 2025