If you don’t remember dreaming, did you dream at all? Likewise, if you do not remember an event occurring, can it be said to have never happened, if there is no one else to speak for the existence of the event? If a past event is so insignificant as to give you no reason to remember it (think of the inane: stepping over puddles, everyday conversations, going to the store), it must have no real reason to have ever existed. Your life, your current circumstances, are the product of a list of prior events. Well, if something happened to you that is so insignificant as to have no affect upon the outcome of this equation, than that event can be replaced by any other inconsequential event and, being so undefined, can be said to have never existed in the first place.
Now, How much of your life can you remember? For the rest must be of no significance, worthless and empty and therefore, truly, not even real.
Thus, The majority of your time here has been absolutely nothing.
I suppose holes can easily here be poked but the original idea stands: if an event, moment or action can be so insignificant as to bear no affect upon you nor anyone else, can it be said to have never existed?