Decades reviewing documents with a critical eye: engineering, legal, training.I check spelling, grammar, syntax, punctuation, and awkward sentence structures. I look for homonyms (in the broader definition) i.e. waste-waist, pour-poor. I check for continuity. If panties are pulled down and off, they can’t be ripped off three paragraphs later. I try to catch factual errors; the Eiffel tower is not in London.