A {sig block} that has been included twice in a {Usenet} article or,
less commonly, in an electronic mail message. An article or message
with a doubled sig can be caused by improperly configured software.
More often, however, it reveals the author's lack of experience in
electronic communication. See {B1FF}, {pseudo}.
[glossary]
[Reference(s) to this entry by made by: {B1FF}{sig block}]