An incomplete comparison is a misleading argument popular in advertising. For example, an advertiser might say "product X is better". This is an incomplete assertion, so it can not be refuted. A complete assertion, such as "product X sells for a lower price than product Y" or "the new product X lasts longer than the old product X" could be tested and possibly refuted.
In grammar, an incomplete comparison is a comparison that leaves out one of the items being compared. Unacceptable: ''Learning Chinese is more difficult.
ore difficult than what?'' Acceptable: ''Learning Chinese is more difficult than learning Spanish.''
See also
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Fallacy
A fallacy is the use of invalid or otherwise faulty reasoning, or "wrong moves," in the construction of an argument which may appear stronger than it really is if the fallacy is not spotted. The term in the Western intellectual tradition was intr ...
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False advertising
False advertising is defined as the act of publishing, transmitting, or otherwise publicly circulating an advertisement containing a false claim, or statement, made intentionally (or recklessly) to promote the sale of property, goods, or servic ...
References
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Advertising techniques
Deception
Informal fallacies