Do you remember having had an argument and both sides got worked up about something one of both supposedly said or not?
This is so common and unfortunately, regardless how clever we are, here are two indications how many lacks we all have in our consicousness.
Here is a short film about how we blank out unpleasant memories:
And in case you want some dry theory about subconscious twists of our thinking,
here is a good summary:
Sodarshan Chakra Kriya 