The March 26 letter “B-I-A-S” suggested that The Post has reached a “new low” in commenting on President Trump’s spelling errors. I don’t think The Post went deep enough. Mr. Trump’s poor spelling reflects problems far more serious than a failure to proofread. My research on language acquisition shows that poor spelling is often the result of not having a reading habit. Studies also show that those who read a lot know more about history and science. They also have greater empathy for others and understand that the world is complex. Mr. Trump is a perfect example of a nonreader, and his lack of a reading habit has hurt all of us.

Stephen Krashen, Los Angeles