The Latin adverb sic ("thus", "just as"; in full: sic erat scriptum, "thus was it written")[1] inserted after a quoted word or passage indicates that the quoted matter has been transcribed or translated exactly as found in the source text, complete with any erroneous, archaic, or otherwise nonstandard spelling or punctuation. It also applies to any surprising assertion, faulty reasoning, or other matter that might be likely interpreted as an error of transcription.
The typical usage is to inform the reader that any errors or apparent errors in quoted material do not arise from errors in the course of the transcription, but are intentionally reproduced, exactly as they appear in the source text. It is generally placed inside square brackets to indicate that it is not part of the quoted matter.
Sic may also be inserted derisively, to call attention to the original writer's spelling mistakes or erroneous logic, or to show general disapproval or dislike of the material.[2]
Sic - Wikipedia
--------
Commentary, September 2005, "The Inequality Taboo," by Charles Murray
There is no technical dispute on some of the core issues. In the aftermath of
The Bell Curve, the American Psychological Association established a task force on intelligence whose report was published in early 1996. The task force reached the same conclusions as
The Bell Curve on the size and meaningfulness of the black-white difference. Historically, it has been about one standard deviation in magnitude among subjects who have reached adolescence*; cultural bias in IQ tests does not explain the difference; and the tests are about equally predictive of educational, social, and economic outcomes for blacks and whites. However controversial such assertions may still be in the eyes of the mainstream media, they ate not controversial within the scientific community.
http://www.iapsych.com/wj3ewok/LinkedDocuments/Murray2005.pdf