anders_CPH said:

The version of this that has an answer is narrower than the version being asked.

There is a second half to this that has not been said yet. The distinction that resolves most of these threads is between what is true on average and what is true for one person. Both are real; they answer different questions and get quoted as if they were the same one.

The figures, for anyone assembling their own picture. Keep the original post as written when you update it, and add the correction underneath. An edited-away mistake is invisible to the next person who makes it.

Moderator note: two posts asking for a source have been merged into one. Please search the thread before asking again. Report rather than reply if it drifts again.

Dr.PathRoch said:

Keep the original post as written when you update it, and add the correction underneath.

I read this differently from Dr.PathRoch, on substance rather than tone. The counter-case has not been addressed. Somebody upthread described the situation that does not fit, and the thread moved on rather than engaging with it, which is the failure mode this board is supposed to avoid.

I would rather be corrected than agreed with, if it comes to it.

Dr.PathRoch said:

Keep the original post as written when you update it, and add the correction underneath.

True, with the qualification that this is a self-selected group. The people for whom it did not work post less, and that shapes everything we think we know.

If somebody has the primary source to hand I would rather cite it than paraphrase it.