What is Philosophy?

Deleuze, G & Guattari, F, 1994, What is philosophy?, Columbia University Press, New York.

The three planes, along with their elements, are irreducible (p. 216): 

Philosophy: plane of immanence, form of concept, concepts and conceptual personae

Art: plane of composition, force of sensation, sensations and aesthetic figures

Science: plane of refer­ence or coordination, function of knowledge, figures and partial observers.