If for example,

I ended up with a pool of 1 dice,

for some task of difficulty 3,

And I rolled 2 3s,

so my result is 3.

I am at -1 to outcome, so my outcome is a net -1.

But I succeed, since it is the result vs difficulty that determines whether or not you succeed, right?

(see page 143)

So this is a unique time when I succeed,

but with a complication.