It is a wlel kwnon pohnnomeen taht you can sawp all the ltteers in a wrod and as lnog as the fsrit and lsat is ccrreot it wlil sitll be cibemreplohnse.
It's wild that I was able to read that in my head at full speed, with the correct word pronunciation (except the last word... wonder what the upper limit on that is anyway?)
Useful reminder that the human brain is a pattern recognition machine par excellence.