Quick Eye Exam...
This will blow your mind...!
Just do it - don't cheat!!!!!!!!!!!!
Try this its actually quite good.
But don't cheat!
Count the number of F's in the following text:
FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS
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Managed it?
Scroll down only after you have counted them!

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OK?
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How many?
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Three?
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Wrong, there are six - no joke!
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Read again!
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FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS
.
.
.
The reasoning is further down...
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The brain cannot process the word "OF".
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Incredible or what?
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Anyone who counts all six F's on the first go is a genius
Three is normal.
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Now sent this to all your friends and see if you are the only one that can't count the F's.