We’ve all done it. Written an email, looked it over, sent it out, and at the very moment it disappears from our screen into the ether, we realize…TYPO! We’ve misspelled the person’s name or put the wrong date or made some other obvious and totally unnecessary error.

So, why does this happen? Because, as Stanislaus Dehaene writes in his book Reading in the Brain, “What we see depends on what we think we’re seeing.”