>>Perhaps there is some other software that does grammar better - I'm sure writing such a program for english grammar would be a mind-blowing task especially if you wanted it to validate a whole paragraph with multiple sentences and such.
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>Yeah, MS has no doubt put a lot of effort into the grammar checker for Word. I can't think of any other parser off the top of my head that's any better.
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>The main trouble is with English, it seems there are more exceptions than rules ;)

There are no exceptions, because there is only one rule which covers everything: "we don't have rules, we have lists".