Memory is a tricky thing. A lot of the time it is difficult to be sure if what you are remembering is the memory from the actual event or if it is an altered memory caused by constant redrawing of said memory. I have had an experience in my life where this was highlighted extremely. I have a memory of when I was a young kid of laying on my bed reading (I had just had my guard rails removed). I remember my parents coming in to ask me if I was ready for lunch to which I replied that I was. I then remember finishing the chapter I was on and heading downstairs to be surprised by my first pet dog! He was a corgi named Zuke. I remember my parents telling me that they got him from a shelter and more about his back story. I then remember running to the basement to grab a blanket for him to make him his own little bed in the living room. When I turned for the stairs I tripped and toppled all the way down the steps. I remember nearly missing one of my toy trucks at the bottom of the stairs. After all was said and done I remember getting up without a scratch and getting a blanket for my new best friend.
Here is the tricky part though, that memory is actually two smashed together. My parents were recording the surprise of my first pet and I have re-watched the video and I never fell down the stairs (that day). I had actually went to my room to grab Zuke a blanket and then ended up playing with him in the living room without falling down the stairs at all that day. The even that I mixed in was another recorded event that my parents have on tape. This even was my 8th birthday party. I was super excited to have all my friends over to my house and had ran for the stairs to grab one of my toys to show some of my friends and that is when I had tripped. I remember correctly now because after watching both videos I can hear my mother yell when I start tumbling down the stairs.
This merging of two memories is a good example of how we can create false positives and have incorrect memories that we could have sworn were real. Not everyone has the opportunity to correct certain false memories through the usage of video tape. Even though this is a minor memory to have mixed up I now have it straightened out in my mind through clear video evidence that I merged two memories in my mind.