Also helps with checking a spelling of a word!
Take a look at this paragraph. Can you read what it says? All the letters have been jumbled (mixed). Only the first and last letter of ecah word is in the right place:
“I cnduo’t bvleiee taht I culod aulaclty uesdtannrd waht I was rdnaieg. Unisg the icndeblire pweor of the hmuan mnid, aocdcrnig to rseecrah at Cmabrigde Uinervtisy, it dseno’t mttaer in waht oderr the lterets in a wrod are, the olny irpoamtnt tihng is taht the frsit and lsat ltteer be in the rhgit pclae. The rset can be a taotl mses and you can sitll raed it whoutit a pboerlm. Tihs is bucseae the huamn mnid deos not raed ervey ltteer by istlef, but the wrod as a wlohe. Aaznmig, huh? Yaeh and I awlyas tghhuot slleinpg was ipmorantt! See if yuor fdreins can raed tihs too.”
And if so, what (if any) implications does this have for spelling?