A Grammar checker.

I’ve just tried Grammatik, a grammar checker built into WordPerfect. To say it’s bad is an understatement. The only actual error it flagged was a typo. All the other errors showed that Grammatik could not parse sentences correctly, and so mistook verbs for nouns and nouns for verbs; demanded modifiers where none were needed; confused proper names with common nouns; didn’t recognise objects; and on and on and on.

One example: “A voice from on high spoke:...” Grammatik said it should read “A voice from a high spoke...”

I don’t know if the other wordprocessors have equally bad grammar checkers. I suspect so. Avoid them, they will thoroughly mislead you.

BTW, Grammatik flagged eight errors in this short screed.