I just tried the query myself. The result set contains this URL http://en.wikipedia.org/wiki/Betteridge's_law_of_headlines http://en.wikipedia.org/wiki/Betteri

I just tried the query myself. The result set contains this URL http://en.wikipedia.org/wiki/Betteridge's_law_of_headlines http://en.wikipedia.org/wiki/Betteridge's_law_of_headli..., which does not work when entered in the browser. It appears that OP merged this URL with the working URL, that occurs on rank 49. Also notice, that a URL variant pointing to this page occurs on rank 89 again.