from
Jargon File (4.4.4, 14 Aug 2003)
pred
//
[Usenet; orig. fr. the Island MUD via Oxford University] Abbreviation
for "predictable", used to signify or preempt responses that are
extremely predictable but have to be filled in for the sake of form
(the phrase is bracketed by <pred>...</pred>). X-Pred headers in mail
or news serve the same end. Figuring out the connection between the
X-Pred tagline and the thread is part of the entertainment. For
example, it is said that any thread about taxation must contain a
reference to Raquel Welch, if only to stop other people from
mentioning her. This is allegedly due to a Monty Python sketch where a
character declares that he would tax Raquel Welch, and he has a
feeling she would tax him.