Knowledge

• There are some very simple purely reactive living systems. They're called bacteria.
• A reactive system takes a stimulus and does something based on it.
• Every other living system stores knowledge and uses it.
• What is knowledge?
• That's a really hard question.
• If you're writing a program, half of the problem is figuring out how to represent the knowledge.
• Deformed Checker Board Example.
• There are different ways to store knowledge.
• Some that you know about are programming variables, integers, booleans, reals, text.
• You can bind things together in objects, this is similar to a frame (which we'll talk about in a few lectures.)
• You can have basic symbols and make relationships between them which is semantic nets and we'll talk about this next week.
• You can have working memory
• You can have rules
• You can have logics