"... it is important to concentrate on the full-fledged version of reduction that takes interactions into account. 'Reduce the system to parts and, once you understand the parts, you will understand the system' is simpler and often works in the sciences - science has advanced because it does work. But this simpler version does not work for systems exhibiting emergence. Instead, the more difficult form of reduction, using overlaid hierarchies ..., is the productive way to approach such systems."

Slots and Values
ref	p245
source	Unnamed