Try this test and see what happens! Read the sentence below: FINISHED FILES ARE THE RE- SULT OF YEARS OF SCIENTIF- IC STUDY COMBINED WITH THE EXPERIENCE OF YEARS Now, go back and count the number of "F's" in the sentence. Answer below: There are six "F's". The human brain tends to see the F in "OF" as a "V". Rarely will anyone find more than three "F's" in the sentence.