Your first question was merged with [this one](http://stackoverflow.com/questions/36504/why-functional-languages/). Originally, merging *completely destroyed* the source of the merge. Not soft-deleted, *destroyed*. This was... horrible. [So it was changed.][1] Now when a question is merged, the source is left as a stub with no answers, and when that is deleted, the site will automatically redirect to the destination.

Unfortunately, links to questions merged before the current "stub" feature was implemented remain forever broken. 


  [1]: https://meta.stackexchange.com/questions/16437/when-merging-questions-leave-the-duplicate-one-as-a-placeholder