why use spell check

I cdnuolt blveiee
taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The
phaonmneal pweor of the hmuan mnid Aoccdrnig to rscheearch at
Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the
ltteers in a wrod are, the olny iprmoatnt tihng is taht the
first and last ltteer be in the rghit pclae. The rset can be a
taotl mses and you can still raed it wouthit a porbelm. This
is bcuseae the huamn mnid deos not raed ervey lteter by
istlef, but the wrod as a wlohe. Amzanig huh?