Which isn't stated anywhere in relation to jumping. There's literally no guidance for the GM on how to handle that. It leaves a lot of questions unanswered.
But... that's how the threshold guidance chart works.
is the task at hand, after you weigh all the variables and considerations, most comparable to the example given for threshold X? Then use threshold X.
Jumping example: maybe a runner wants to leap from one rooftop to another, which is separated by a narrow alleyway. GM weighs whether there's a good bit of room available for a running start, whether the destination rooftop is slightly higher or lower than the current one, how far the gap is, whether you're carrying heavy equipment/extractees, etc. The guidance chart isn't going to cover all those variables. Maybe, when it's all said and done, the gm figures this is a doable but challenging task. Going by the guidelines, that's about a threshold 4. Maybe, if the runner wants to leap in another direction, across a major boulevard to a higher rooftop, the gm might determine it's theoretically possible, but would be a remarkable world-record style feat, and call the threshold 6 or even higher.
Also jump rules really belong under Athletics.
No argument there, but just couldn't make them fit on pg. 93. One of the hard rules errata has to work within: the layout cannot be changed (too many headaches, particularly with tables of contents and index)