How binarily dull.
I roll 1-5 - I fail in the middle of the river, far from each bank and where the current is fastest
I roll 6-11 - I fail relatively close to one bank or the other, where the current is slower and rescuers (if there are any) can more easily aid me
I roll 12-16 - I make it across but I'm fatigued by the effort, and may have been carried farther downstream by the current than I'd like
I roll 17-20 - I make it across no problem and am ready to keep on truckin'.
I roll 1 - I successfully manage to miss something that should be obvious (we've all done this in real life)
I roll 2-6 - I see the basics and that's it - the sun's up and the path we're following bends to the left a little way ahead ('keep your eyes on the road')
I roll 7-11 - I see the basics plus note there's a thick covering of leaves on the ground around us
I roll 12-14 - I notice there might be something under the leaves worth checking into but have no idea what it is
I roll 15-17 - I notice there's a body under the leaves
I roll 18-19 - I notice there's a body under the leaves and possibly a trail of disturbed leaves leading away to the left of our original path
I roll 20 - as 18-19 plus I notice there's someone up a tree to the left, watching us (we've all done this, too: found something we weren't looking for while looking for something else)
(not the best example but I hope it'll do for these purposes)
I'm moving the goalposts not to move the goal itself - that's right where it started - but to spread them farther apart, giving a wider goal (or a spectrum) centered on the original goal.
Lanefan