Nosism, from the Latin nos, "we", is the practice of using the pronoun "we" to refer to oneself when expressing a personal opinion.
Contents
Depending on the person using the nosism different uses can be distinguished:
The royal "we" or pluralis majestatis
The royal "we" (pluralis majestatis) refers to a single person holding a high office, such as a monarch, bishop, or pope.
The editorial "we"
The editorial "we" is a similar phenomenon, in which an editorial columnist in a newspaper or a similar commentator in another medium refers to themself as we when giving their opinion. Here, the writer casts themself in the role of a spokesperson: either for the media institution that employs them, or more generally on behalf of the party or body of citizens who agree with the commentary.
The author's "we" or pluralis modestiae
Similar to the editorial "we", pluralis modestiae is the practice common in mathematical and scientific literature of referring to a generic third person by we (instead of the more common one or the informal you):
"We" in this sense often refers to "the reader and the author," since the author often assumes that the reader knows and agrees with certain principles or previous theorems for the sake of brevity (or, if not, the reader is prompted to look them up).
This practice is common in mathematics, philosophy, and comments in computer code.