There are cases when a given question is asked several times (possibly with minor variations). As an example:
How do I find the Excel column name that corresponds to a given integer? asked Aug 22 '08 at 15:49
How to convert a column number (eg. 127) into an excel column (eg. AA) asked Oct 8 '08 at 6:55
Function to convert column number to letter? asked Oct 9 '12 at 9:33
Some of these may be tagged as duplicates of one another. In this case, 1 is tagged as duplicate of 2. But if I hit question 2, I might never know about question 1, and its corresponding potentially useful answers.
I propose that a "group of duplicates" is implemented, so once 3 is identified as duplicate of 2, it is automatically added to the group, and then 3 also shows up linked when 1 is viewed.
PS: In the example, perhaps 2 should be tagged as duplicate of 1, given the dates of first asking. This indicates that the best (who decides?) question is to be retained as the main one.
EDIT Example, using a few of the questions in the list given in a comment (I do not know how to get to that list, but it appears to list linked questions, which I guess it may contain a lot of non-duplicates, but simply linked, questions):
Warning: mysql_num_rows() expects parameter 1 to be resource, (say, question 1) has a sign
(say, question 2).
(same question 2; the title show in the last case is slightly different, but it is irrelevant).
So, I think it will be useful to have in Q1 a sign like
and so on ((Qx) is only to make the idea more clear, not necessarily to be shown in actual cases; it might be useful though). And, that this is updated automatically for all Q's in the group when, say, a new Q4 is identified as a duplicate of Q2.
As of now, there is no indication for the readers of Q3 that Q1 is a duplicate, and vice versa. Linked is not the same as duplicate.
This is the general idea, any variation would have to make it easier for the readers to go straight to any of the duplicates.
PS1: This assumes "duplicate" is a strict equivalence relation. Although this may not be so strict in SO/SE answers/questions, I think this will still be very useful.
PS2: Some of these questions may show up linked in "Related", but some may not.
PS3: I found the related questions below, none of which seem to me to suggest what I am proposing here. So, they would not be grouped with the present one, if the proposal ever gets implemented.