Count the number of F's in the following text:






no cheating !!





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!!





Read again!







FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS


The reasoning is ... ...



The brain cannot process the word "OF".