This will blow your mind... Just do it - but don't cheat! You would only be cheating yourself! Try this, its actually quite good. But don't cheat! Quickly read through the following text and count the number of F's in it. FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS Managed it? Scroll down only after you have counted them! OK? How many? Three? Wrong, there are six - no joke! Read again! FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS The reasoning is that the brain cannot process the word "OF". Incredible or what? Anyone who counts all six F's on the first go is a genius. Three is normal.