There are six F's in the sentence.
A person of average intelligence finds three of them.
If you spotted four, you're above average.
If you got five, you can turn your nose up at most anybody.
If you caught six, you are a genius.
Here is the same text, but we highlighted the F's for your review!
FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS.
Most people miss the F’s from the words ‘OF’