Very good, Hydra, you are partly right. 
But the superior colliculus is but a small part of a larger  equation.
Ever forget a name and then later it pops into your forebrain without preamble?  A set mechanism has evolved in our subconscious operating system which  allows our cognitive mechanisms  to select as needed from the jumble of the surrounding enviorment in order to enhance our  survival.
Try this: Each day wait until  some  odd name or odd number or  odd event repeats itself...then wait...it will threepeat.
But here is a more philosophical  question...are that which we call we merely  the sensing mechanisms of our own subconscious or are  we the we that is in control? 
Good question.  
