Buckets o Fail

Why is it that MS spell checker thinks that "position o privilege" is a perfectly viable phrase?

After Firefox spell check teaches me how to spell privilege of course.

This is just greater proof that I'm smart enough to engage in verbosity utilizing a diverse and sometimes impromptu lexicon featuring a plethora of phrases and references, both literary and contemporary, but I'm still too lazy to spell any of it right.

Thank you spell check.