Relativism is the idea that views are relative to differences in perception and consideration. There is no universal, objective truth according to relativism; rather each point of view has its own truth. Relativism is the idea that views are relative to differences in perception and consideration. There is no universal, objective truth according to relativism; rather each point of view has its own truth. The major categories of relativism vary in their degree of scope and controversy. Moral relativism encompasses the differences in moral judgments among people and cultures. Truth relativism is the doctrine that there are no absolute truths, i.e., that truth is always relative to some particular frame of reference, such as a language or a culture (cultural relativism). Descriptive relativism seeks to describe the differences among cultures and people without evaluation, while normative relativism evaluates the morality or truthfulness of views within a given framework. Anthropological relativism refers to a methodological stance, in which the researcher suspends (or brackets) his or her own cultural biases while attempting to understand beliefs and behaviors in their local contexts. This has become known as methodological relativism, and concerns itself specifically with avoiding ethnocentrism or the application of one's own cultural standards to the assessment of other cultures. This is also the basis of the so-called 'emic' and 'etic' distinction, in which: Philosophical relativism, in contrast, asserts that the truth of a proposition depends on the metaphysical, or theoretical frame, or the instrumental method, or the context in which the proposition is expressed, or on the person, groups, or culture who interpret the proposition. Methodological relativism and philosophical relativism can exist independently from one another, but most anthropologists base their methodological relativism on that of the philosophical variety. The concept of relativism also has importance both for philosophers and for anthropologists in another way. In general, anthropologists engage in descriptive relativism ('how things are' or 'how things seem'), whereas philosophers engage in normative relativism ('how things ought to be'), although there is some overlap (for example, descriptive relativism can pertain to concepts, normative relativism to truth). Descriptive relativism assumes that certain cultural groups have different modes of thought, standards of reasoning, and so forth, and it is the anthropologist's task to describe, but not to evaluate the validity of these principles and practices of a cultural group. It is possible for an anthropologist in his or her fieldwork to be a descriptive relativist about some things that typically concern the philosopher (e.g., ethical principles) but not about others (e.g., logical principles). However, the descriptive relativist's empirical claims about epistemic principles, moral ideals and the like are often countered by anthropological arguments that such things are universal, and much of the recent literature on these matters is explicitly concerned with the extent of, and evidence for, cultural or moral or linguistic or human universals.