comment: >
  
  Those aren't our memories. Those are all historical events that none of us have experienced
context: This is a friendly reminder to read our rules.
  Remember, /r/Showerthoughts is for showerthoughts, not "thoughts had in the shower!"
  (For an explanation of what a "showerthought" is, please read this page.)
  Rule-breaking posts may result in bans. >
  
  What? Seem to be a bit of double standards here.
  Are you referring to the past itself? Then that’s just as real as the future. 
  Are you referring to specific events people have in mind of what occurred in the past? Then you must compare that to specific events people have in mind of what will occur in the future - ie, predictions. Predictions aren’t guaranteed, and in fact are overall even more flawed than our memories. 
  So either way, no. >
  
  exactly! op isn't comparing the same things.
  past (real), future (real), our memories (flawed past), our imagination (flawed future). out of these 4, op chose two that one is subjective, and one is objective, and is surprised that gasp! one isn't real! >
  
  If no one were around to confirm that an event happened, how do we know our memories our real? What if our past is just a fabrication? I think about this sometimes. >
  
  Because we remember events that other people can confirm, which means that our memory is somewhat reliable and accurate. >
  
  The Titanic, Chernobyl, the Hindenburg ... all "somewhat reliable".