It is, because sometimes DDG is so sure you made a typo, they don't bother to mention it and just search the correction. Try searching "president ovama". The fi

It is, because sometimes DDG is so sure you made a typo, they don't bother to mention it and just search the correction. Try searching "president ovama". The first one or two pages of results are almost exactly the same as the results for "president obama", with no mention of the correction. I know this is sort of a contrived example, but you get the point. As far as I can tell, Google will always tell you when it thinks you made a mistake, and provide a link to search for your exact query.