The notation "[sic]" is used within square brackets to indicate that an error or unusual feature present in a quoted text is intentionally reproduced exactly as it appears in the original source. Here's how to use it correctly:
Clarifying an error: If you are quoting someone or referencing a written source that contains an error or mistake, you can use "[sic]" immediately after the error to indicate that it is not your own mistake, but rather an accurate representation of the original text.
Example:
"The sign read: 'No Tresspassing [sic]'."
In this example, the word "tresspassing" is misspelled in the original sign, but you have reproduced it exactly as it appears, while indicating that the error is intentional.
Acknowledging unconventional usage: "[sic]" can also be used to indicate unconventional or non-standard usage of language, idiomatic expressions, or dialects.
Example:
"He said, 'I ain't [sic] got no time for that nonsense.'"
In this example, the use of "ain't" and the double negative "ain't got no" may be considered non-standard English. By including "[sic]" after "ain't," you acknowledge that it is not a mistake but a deliberate representation of the speaker's words.
It's important to use "[sic]" sparingly and only when necessary to clarify errors or unconventional elements in the original text. The purpose of using "[sic]" is to maintain accuracy and transparency when quoting or referencing sources.