ties rationality to the validity basis of everyday speech. This framework locates reason in the everyday practices of modern individuals. This is in contradistinction to theories of rationality (e.g. Plato, Kant, etc.) that seek to ground reason in an intelligible and non-temporal realm, or objective "view from nowhere", which supposes that reason is able adequately to judge reality from a detached and disinterested perspective. While Habermas's notion of communicative rationality is contextualized and historicized, it is not relativistic. Many philosophical contextualists take reason to be entirely context-dependent and relative. Habermas holds reason to be relatively context specific and sensitive. The difference is that Habermas explicates the deep structures of reason by examining the presuppositions and validity dimensions of everyday communication, while the relativists focus only on the content displayed in various concrete standards of rationality. Thus, Habermas can compare and contrast the rationality of various forms of society with an eye to the deeper and more universal processes at work, which enables him to justify the critique of certain forms (e.g, that Nazism is irrational and bad) and lend support to the championing of others (e.g, democracy is rational and good). The relativists on the other hand can compare and contrast the rationality of various forms of society but are unable to take up a critical stance, because they can posit no standard of rationality outside the relative and variable content of the societies in question, which leads to absurd conclusions (e.g, that Nazism is morally equivalent to democracy because the standards for both are relative). Validity dimensions Concerning (5), Habermas's communicative rationality emphasizes the equal importance of the three validity dimensions, which means it sees the potential for rationality in normative rightness (WE), theoretical truth (IT) and expressive or subjective truthfulness (I). The differentiation of these three "worlds" is understood as a valuable heuristic. This leaves each to its specific forms of argumentation and justification. However, these validity dimensions should be related to one another and understood as complementary pieces in a broader conception of rationality. This points towards a productive interpenetration of the validity dimensions, for example the use of moral insights by the sciences without their having to sacrifice theoretical rigor, or the inclusion of psychological data into resources of moral philosophy. These last points concerning the breadth of communicative rationality have by far the most important implications. By differentiating the three validity dimensions and holding them