Giving different names to similar concepts in order to distinguish their subtle
differences Example. Resistance vs. impedance
Similarity: [Wangs, p.456, l.17].
Crucial differences: [Wangs, p.456, l.18-l.19].
In order to be user friendly, the function of a device should be
expressed in simple and direct language.
Example. Received signal [Wangs, p.492, l.8].
Specular reflection originates from the word, speculum, a common mirror alloy in ancient times
[Hec, p.99, r.c., l.2-l.4].