*Matthew B. Crawford* # Progressive Summary # Definitions # Chapter Notes # Quotes # References [Kirsh 1995 - The intelligent use of space](zotero://select/items/1_2PPA63Y5) - Space is a resource that must be managed, much like time, memory, and energy. When we use space well we can often bring the time and memory demands of our tasks down to workable levels. - A jig is a device for stabilizing a process: it is a mechanism for reducing the degrees of freedom of a target object. A vice is a jig, a table top can serve as a jig, but so can a “pick” in basketball, or the slides on a cabinet drawer which determine the direction of free movement, or compliance. Jigging is one way of preparing or structuring the environment. The more completely prepared an environment is, the easier it is to accomplish one’s task. - We can draw a logical distinction between physically jigging an environment and informationally jigging it; although in practice the two often go together. The distinction is between planting information in the environment to reduce the perceived degrees of freedom, and planting physical impediments or constraints in the environment to reduce the physical degrees of freedom an agent actually has. At the simplest level, the difference is between cues and constraints.