Shortening the prayer when in doubt regarding the distance of travel
Question

                If one is in doubt whether the distance is far enough to allow him to shorten the prayer, 
is it permissible for him to shorten it?
Praise be to Allah.If one does not know and there is nothing to indicate whether or not the distance is far enough, then a 
traveler is not allowed to shorten the prayers. The completion of prayers is the default requirement 
and cannot be abrogated or over-ridden by doubt or uncertainty (as per the Shafi'yah opinion).