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I had a question of the form "does something like X exist?"
Someone wrote a response to say that, No, X does not exist, but I could write it if I liked.
I had suspected as much, so I marked his answer as the accepted answer. Today someone actually posted the code to do X for me, and I feel that the new poster deserves the "Accepted Answer" checkmark.

Is it poor form for me to pick a new Accepted answer? Does the original answerer get penalized in terms of reputation?

While the original responder's answer was accepted at the time, I feel this new answer is really more helpful.

Which of these responses should I accept?
What does the notion of a single accepted answer mean with a question that is subjective that could have multiple "right" answers?

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Acceptance is not a real necessity for discussions on a Meta site. Generally, you accept what you think best concludes the question, or what you think best represents the solution to the issue. Sometimes people accept what they think is the best answer, it doesn't have to mean the universal best. If there is no conclusion, and you don't agree with any current answer to the point you "accept" it, then you don't need to mark anything as accepted. As long as a question is still open for discussion, there's no rush to have that green checkmark. – Grace Note Aug 27 '10 at 15:38

Is it poor form for me to pick a new Accepted answer?

Absolutely not!

If it's switching to a more correct answer, it is the right thing to do.

The original user will lose the 15 rep bonus immediately.

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@devin It doesn't require a rep-recalc, since it's just a vote reversal. – Grace Note Aug 25 '10 at 15:02
It happens automatically, the same as retracting an upvote – Michael Mrozek Aug 25 '10 at 15:02
@Grace Bah. Shows what I know. – devinb Aug 25 '10 at 15:10
It's nice to comment on the previously accepted answer, in particular because of:… – Marc-André Lafortune Jul 7 '11 at 17:39

Is it poor form for me to pick a new Accepted answer?

Not in my opinion, though I don't do so gratuitously.

Does the original answerer get penalized in terms of reputation?

Well, they lose the 15 points (if not community wiki) and that answer might cease to qualify for a badge (the badge doesn't go away, but they have to "make it up" before they can get a new one of that type).

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I see no problem with changing the accepted answer if a more comprehensive or factually correct answer is added at a later time.

It isn't mean or spiteful. It is just you doing the responsible thing with the questions you own and it benefits everyone who comes to that page later.

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As everyone else said, there's certainly no problem with it. If it seems to be happening to you a lot, you might be accepting an answer too fast -- you should wait a couple days to give people a chance to answer

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Think that the idea about these sites is to get the best and most complete bookwork there is about the subject. So it is always the best to accept the best answer suitable. In time that could change.

Your question could slighty change too in time due to new knowledge gained and you have refrased the question, so another answer could be netter suited.

Don't feel bad for dismissing some point as it ain't a race to win. Not in that way.

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