Friction friction and wear in so-called self-lubricating materials. Fluid friction occurs between fluid layers that are moving relative to each other. This internal resistance to flow is named "viscosity". In everyday terms, the viscosity of a fluid is described as its "thickness". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. The less viscous the fluid, the greater its ease of deformation or movement. All real fluids (except superfluids) offer some resistance to shearing and therefore are viscous. For teaching and explanatory purposes it is helpful to use the concept of an inviscid fluid
The Resistance to Theory about language." The resistance to theory is therefore, according to de Man, a resistance to reading: "Nothing can overcome the resistance to theory since theory 'is' itself this resistance." De Man concludes however by stating that "literary theory is not in danger of going under; it cannot help but flourish, and the more it is resisted, the more it flourishes, since the language it speaks is the language of self resistance." (p. 365) The Resistance to Theory "The Resistance to Theory" is an essay by Paul de Man (1919–83), a renowned literary critic and theorist belonging to the Yale School