There is a question by Evan Carroll about the origins of "sargable" that initially had received some "tough love" and got closed as off-topic. I was among those who voted to close it (as too localized), at the time it looked to me more like a rant.
Recently I saw it in the "Reopen" queue, and now, after having been helpfully edited by Jack Douglas, it seems more appropriate and actually answerable.
I did some research of my own and I think I might have a pretty definitive answer to the question as stated now. I voted to reopen the question but it needs more votes.
Can we please reopen the question?