Count the number of 'F's in the following text:
FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE EXPERIENCE OF YEARS
Finished?
Scroll down only after you have counted them, OK.
How many did you count? Three?
Wrong there are six - no joke!
Read again and count.
The brain cannot process "OF"
Incredible or what?
Anyone who counted all six 'F's on the first try is a genius.

Three is normal.