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.

Or rather…

According to a researcher (sic) at Cambridge University, it doesn’t matter in what order the letters in a word are, the only important thing is that the first and last letter be at the right place. The rest can be a total mess and you can still read it without problem. This is because the human mind does not read every letter by itself but the word as a whole.

Chances are you’ve seen this in your inbox. Chances are you also understand it. It purports that the order of the letters inside a given word doesn’t matter, as long as the first and last letters of each word are in the right place.

Many people are surprised they can read it without much problem, even though the letters are not in the correct order.

It seems that when we read, we extract a lot of information from the context—so understanding several words in a sentence can help us guess another one. We also scan words and pick out markers that make them easy to identify, such as certain letter combinations and sounds. These elements make it easier to infer the word even when the letters are not in perfect order.

You might note that in the passage above, many of these markers were maintained. For example, in “according” (aoccdrnig), the double c was maintained. Splitting them up (aricdocng) makes the word harder to read.

In Cambridge (Cmabrigde) the second half of the word, “bridge,” was very nearly maintained. Changing the scramble to break up “bridge,” as in Cgmiadrbe, makes it much harder to read.