A readable Wired article about why proofreading is difficult. My father, a technical editor for the U.S. Government, says he was so attuned to seeing typos that his brain would show them to him in a larger type size.

Typos suck. They are saboteurs, undermining your intent, causing your resume to land in the “pass” pile, or providing sustenance for an army of pedantic critics. Frustratingly, they are usually words you know how to spell, but somehow skimmed over in your rounds of editing. If we are our own harshest critics, why do we miss those annoying little details?The reason typos get through isn’t because we’re stupid or careless, it’s because what we’re doing is actually very smart, explains psychologist Tom Stafford, who studies typos of the University of Sheffield in the UK. “When you’re writing, you’re trying to convey meaning. It’s a very high level task,” he said. —Wired.