Sugna -- I am unaware of any written rule or decree that prevents mutual
combatants from being jumped while engaged in a mutual challenge. If I am
wrong, I welcome from anyone a reference to such written decree.
To my understanding, the rule is unwritten. The technical requirements of
issuing challenges serves only to publicize the event, and give notice to all
that the combatants are engaged in mutual combat. If it is not publicized
in this fashion, I agree, the mutual combatants open themselves up to the
possibility of being jumped. IF, however, the jumper is on notice that the
combat is mutual and is a mutual challenge -- depsite it not being publicly
disclosed in 'challenges', then the act of jumping with that knowledge is no
different than if it had been publicly disclosed through technical issuance.
It remains the act of a coward, and remains a personal embarassment.
Written by my hand on the 10th of Eleuthral, in the year 1072.