Previous owner’s name covered inside Bickerton argues that each of the properties distinguishing human intelligence and consciousness from that of other animals can be shown to derive straightforwardly from properties of language. In essence, language arose as a representational system, not a means of communication or a skill, and not a product of culture but an evolutionary adaptation. The author stresses the necessity of viewing intelligence in evolutionary terms, seeing it not as problem solving but as a way of maintaining homeostasis―the preservation of those conditions most favorable to an organism, the optimal achievable conditions for survival and well-being. Nonhumans practice what he calls "on-line thinking" to maintain homeostasis, but only humans can employ off-line thinking: "only humans can assemble fragments of information to form a pattern that they can later act upon without having to wait on that great but unpunctual teacher, experience."