another intelligence test

There is no intelligence forumi could find, so here it is.
Try this only once and be honest... This is not a joke, but a
true test.

Read the following sentence: FINISHED FILES ARE THE RESULT OF
YEARS OF SCIENTIF- IC STUDY COMBINED WITH THE EXPERIENCE OF
YEARS.

Now read through the above sentence counting aloud the "F"s as
you find them (1...2...etc). Count them ONLY ONCE: Do not go
back and count them again!!!.

OK - GO!

See below for answers ...

ANSWER:

There are six F's in the sentence. One of average intelligence
finds three of them. If you spotted four, you're above average.
If you got five, you can turn your nose at most anybody. If you
caught six, you are a genius. There is no catch. Many people
forget the "OF"'s. The human brain tends to see them as V's and
not F's. Pretty weird, huh?