America's physical and cultural landscape is captured in these two classics of American history. Letters provides an invaluable view of the pre-Revolutionary and Revolutionary eras; "Sketches" details in vivid prose the physical setting in which American settlers created their history.[...]

Knowledge representation is at the very core of a radical idea for understanding intelligence. Instead of trying to understand or build brains from the bottom up, its goal is to understand and build intelligent behavior from the top down, putting the focus on what an agent needs to know in order to [...]