What usually happens as one of the 'solve your real problem' people is context. You searched for a path and ended up with a path of A->B->C->D->#block->F but you only tell the group about D->#block and all the readers are guessing how you constructed a path to get to D. The destination of F is often also not clear and missing from the problem description. Even if the reader can approximate a route from A->...->D->#block->F they have a chance of applying their own experience, because often D->#block is a true dead end of the hopeful path of A->F.

Too many systems have contextual inputs that only make the solution apparent with adequate context, so really we are hoping for A and F.