Greenwood press

SYMBOLIC LOGIC
137
An electrical circuit using logic switches.

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cluded the computer recognition of handwritten Japanese Kanji characters,
home-use blood-pressure indicators, and recognition of trends in masses of infor-
mation on stock prices. Fuzzy logic procedures appear in such diverse applica-
tions as determining the length of hospital stays, detecting insurance fraud,
deciding where to drill for oil, and selecting the television slot time that would
be the best for an advertiser.
online sources for further exploration
The DOIT Information Science online course (select “hardware”)

Boolean search vocabulary


Logic in the computer language C

Logic in humor: Monty Python’s argument clinic

Logic in rhetoric

Fuzzy logic

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SYMMETRY
Many everyday objects are symmetrical. Something is reflection-symmetric
if it is divided into two equal pieces so that one piece can fold directly over the
other piece. The folding line is called the line of symmetry, and is also a reflect-
ing line. Numerous types of insects are reflection-symmetric, such as butterflies
and ants. 
Human faces are nearly reflection-symmetric, but no one is perfect! Seldom
are human feet perfectly symmetrical, since one foot is typically slightly larger