How Many F's ?

Here's a quick test of your perception....read the following and count the number of "f'"s in the paragraph. 

Finished files are the result of years of scientific study combined with the experience of many years!

How many did you get? Most people come up with an immediate answer of 3, but how about you?

Count again! If in doubt, start at the end and read it backwards.

Proof positive that "perception is reality".