> Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn’t mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.
I think that paragraph oversimplifies. (For example, splitting up the gh in "rghit" or the tt in "ltteers" would make them much harder to scan.) But clearly what it's getting at is true, that there are certain details of words and letters that we tend to focus on, and we can ignore quite a lot of noise as long as those details are in place.