Asking a question to help you figure out the answer
Helping you to help yourself
Sorta like rubber ducking
Ever found yourself not knowing the answer to a question, throwing together a quick question either into stackoverflow or your friendly forum, seeing your question looking a little bare and then thinking, "Hmm, better add some more detail to make it easier for someone to help me".
So you write some details, and then some more, and somewhere in the process of carefully outlining what the issue was your mind switches tracks, and as you slowly proof-read your meticulously researched question you realise that you've answered your original problem.
Ok, maybe it happened sooner, that facepalm moment you realised what silly thing you did, and how to fix the now obvious issue. The thing is what happens after, I used to just delete the question. Never post it, problem solved.
At some point along the way I stopped doing that and posted it anyway, along with the answer, of course, It's a gift of sorts, to someone else a perhaps distant future who hits the same roadblock. Heh, maybe it'll be me.