So I am gonna talk a little bit briefly about different systems of memory, umm, and in fact much of the memory that influences and guides our, our everyday life actually kind of hides in the background. You actually don't know that when you are using the bulk of your memory. And this is called implicit or procedural memory. This includes things like cultural and social norms, so kind of understanding how you are supposed to behave in a classroom or expecting a certain thing to happen when you walk into a restaurant. These are all things that we have learnt and acquired over our years but it's not necessarily something that we think about. Language, also, in many aspects, is something that is fairly automatic and we’ve acquired and used very naturally, and other learned skills such as reading or driving. These are things that might have been effortful at one time, but now they just come very easily and automatically to us. And in fact, if you actually try to describe to somebody how you drive or how to drive, it actually kind of messes you up. So these are in a lot of, well, in a lot of cases, consciousness kind of gets in the way of a lot of these aspects of implicit memory. Now when we’re talking about our memory, so for instance, people tell me a lot that their memories are bad, when people are saying, when they talk about their memory, they're usually talking about explicit or episodic memory, and these are very different from implicit memories.