The best academic I know is dyslexic. It isn't me. The guy just finished the second of a planned five volumes on PhD level mathematics that, in my view, will become the mathematical encyclopedia for applied mathematics in coming years. He has to work 5X as hard as me and others I know to write. He is one of the most prolific mathematicians I know (averages ~1 paper/month).

Your complaint is a book-cover issue. The quality of the argument is independent of an occasional typographical error.

I am confident your colleague works 5x harder because he/she does not want to get the spelling of century wrong. This is not a simple typo.

For me, these mistakes are equivalent to Van Halen’s “Brown M&Ms” (see trending HN article: https://news.ycombinator.com/item?id=23985817), and I stand by my original assertion. If you cannot get this right, I do not trust any analysis or conclusions in your paper. Someone who hasn’t taken the time to proofread their work likely rushed the analysis and conclusions as well.