People not explaining things because they don't exists. Isn't that what a good site is for?
I was following you until this, at which point I couldnt anymore.

Unless its a staple of the MMO community, or a massively noteworthy feature (and even then, Guild Wars has perhaps the single best support wiki of any MMO, and im not sure it tells you anywhere that you cant jump. you just... cant jump and you can play the game and know you cant jump), people cant tell you its not in a game