Can You Raed Tihs?
Or perhaps “The Human Mind Works In Mysterious Ways”, “See, Context Is Important”, or “Ddue thta’s wreid”:
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 plclae. The rset can be a total 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.
According to snopes.com, this might just be an urban legend – the fact that there was real research on it anyway, and at Cambridge.