The document discusses the structure of language including phonemes, morphemes, surface structure, and deep structure. It also discusses rules of language such as grammar, semantics, and syntax. The document then covers mental imagery, concepts including prototypes and idealized cognitive models. It describes the problem solving process including problem representation and possible solution strategies like trial and error, algorithms, and heuristics. Finally, it discusses obstacles to problem solving like motivation and set, as well as ways to improve problem solving ability such as elimination of possibilities and visualization.