Google and inflection
It is a generally useful feature that Google tries to “Do What I Mean” instead of taking our queries literally to “Do What I Say”, but sometimes it’s annoying.
For example, searching for [sarah palin trigonometry] includes results that do not contain the word ‘trigonometry’ at all. Fortunately, searching for [sarah palin "trigonometry"] works (which might contradict intuition that putting quotes around single words should not matter).
I have seen Google do this many times (return results which do not contain the words searched for), but can’t recall other examples right now… can you?