Take your time and see if you can read aloud each of the following lines without making a mistake. The average person cannot.
This is this cat.
This is is cat.
This is how cat.
This is to cat.
This is keep cat.
This is a cat.
This is dumbass cat.
This is busy cat.
This is for cat.
This is forty cat.
This is seconds cat.
Now go back and read the third word in each line from the top down.
This is this cat.
This is is cat.
This is how cat.
This is to cat.
This is keep cat.
This is a cat.
This is dumbass cat.
This is busy cat.
This is for cat.
This is forty cat.
This is seconds cat.
Now go back and read the third word in each line from the top down.
the repeats 
