Well, yeah, that's the whole point of the thread. The rules say you can possible jump farther than your strength would normally allow, without telling you how to determine difficulty or otherwise adjudicate it. Hence "incomplete."
I appreciate what you're saying here but it misses the point I was making.
If at max strength allowed in the game for the race of the character, the character still would not make the jump.. the character can not do it without some sort of assistance regardless of how well the player rolls. So you have some basis for how to judge the matter distance wise (any distance to the max allowable strength) and DC wise (split the distances up to max DC and apply appropriately)
Just because something isn't explicitly stated in the rules to cover a specific situation, does not mean that you can't operate within or combine the rules as written to come out with a logical answer. I do agree that coming up with such a thing on the fly is tough because you're trying to conserve time and handle something to the tastes of a bunch of people at the table, so I'm not saying anyone should have come up with such a thought process in the moment.
However, as you DM and gain experience over time, these things become easier, it's like the difference between being fluent in a language and actually thinking in the language. While the above came naturally to me in looking at your question, I doubt it would have five years ago.
We just have different thoughts about what is and what is not "incomplete."
Thanks,
KB