system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If human body regenerates cells all the time, how memories persist in brain?

If brain cells also undergo the life-and-death (or regeneration) cycle - how are stored memories or electrical impulses carried forward?
gpt
"You" are not the molecules that make you up, but rather the arrangement of those molecules. The same applies to your memories - memories are the pattern of connections between brain cells. If all the cells in a connection are replaced, but the new cells are connected in the same way, then the memory remains the same, because the memory is the pattern of the connection, not the molecules that make it up. 

If that's not clear enough, take an analogy. You have a lego set, let's say it's the Batmobile. If you take it apart, you still have all the pieces, but you no longer have the Batmobile. If you buy a copy of every piece separately and swap them into the model one by one, you still have the Batmobile, but none of the pieces are the original pieces. Your memory is the Batmobile, not the pieces.