system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come when people experience memory loss they can forget everything and everyone they know, but they still know how to speak?
gpt
There are multiple different types of memory all of which are stored and accessed in different ways in the brain.

Procedural memory, which governs things that are learned through repetition, is one of the strongest, most durable types of memory we have. It's almost impossible to wipe it out without also destroying the brain to the point where the person is no longer really there at all.