Invention and Engineering
In philosophy, systems theory, science, and art, emergence occurs when a complex entity has properties or behaviors that its components do not have on their own, and emerge only when they interact in a wider whole. Emergence plays a central role in theories of integrative levels and of complex systems. For instance, the phenomenon of life as studied in biology is arguably an emergent property of chemistry and physics.
4-6-2.
British Rail Class 21 (NBL).
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