How many Alphabet 'F' are there?

Don't Cheat!!!

Try this ..

Count the number of F's in the following Sentence in 15 seconds:

"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 Alphabet F's.

Read again!

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

The reasoning is further down...

The Brain cannot process the word "OF".
Incredible or what?