Here is why they are using Kant .....
Kant's Philosophy
The keystone of Kant's philosophy, sometimes called critical philosophy, is contained in his Critique of Pure Reason (1781), in which he examined the bases of human knowledge and created an individual epistemology. Like earlier philosophers, Kant differentiated modes of thinking into analytic and synthetic propositions. An analytic proposition is one in which the predicate is contained in the subject, as in the statement “Black houses are houses.” The truth of this type of proposition is evident, because to state the reverse would be to make the proposition self-contradictory. Such propositions are called analytic because truth is discovered by the analysis of the concept itself. Synthetic propositions, on the other hand, are those that cannot be arrived at by pure analysis, as in the statement “The house is black.” All the common propositions that result from experience of the world are synthetic.
Propositions, according to Kant, can also be divided into two other types: empirical and a priori. Empirical propositions depend entirely on sense perception, but a priori propositions have a fundamental validity and are not based on such perception. The difference between these two types of proposition may be illustrated by the empirical “The house is black” and the a priori “Two plus two makes four.” Kant's thesis in the Critique is that it is possible to make synthetic a priori judgments. This philosophical position is usually known as transcendentalism. In describing how this type of judgment is possible Kant regarded the objects of the material world as fundamentally unknowable; from the point of view of reason, they serve merely as the raw material from which sensations are formed.
Objects of themselves have no existence, and space and time exist only as part of the mind, as “intuitions” by which perceptions are measured and judged.
In addition to these intuitions, Kant stated that a number of a priori concepts, which he called categories, also exist. He divided the categories into four groups: those concerning quantity, which are unity, plurality, and totality; those concerning quality, which are reality, negation, and limitation; those concerning relation, which are substance-and-accident, cause-and-effect, and reciprocity; and those concerning modality, which are possibility, existence, and necessity. The intuitions and the categories can be applied to make judgments about experiences and perceptions, but cannot, according to Kant, be applied to abstract ideas such as freedom and existence without leading to inconsistencies in the form of pairs of contradictory propositions, or “antinomies,” in which both members of each pair can be proved true.
In the Metaphysics of Ethics (1797) Kant described his ethical system, which is based on a belief that the reason is the final authority for morality. Actions of any sort, he believed, must be undertaken from a sense of duty dictated by reason, and no action performed for expediency or solely in obedience to law or custom can be regarded as moral. Kant described two types of commands given by reason: the hypothetical imperative, which dictates a given course of action to reach a specific end; and the categorical imperative, which dictates a course of action that must be followed because of its rightness and necessity. The categorical imperative is the basis of morality and was stated by Kant in these words:
“Act as if the maxim of your action were to become through your will a general natural law.”
Kant's ethical ideas are a logical outcome of his belief in the fundamental freedom of the individual as stated in his Critique of Practical Reason (1788). This freedom he did not regard as the lawless freedom of anarchy, but rather as the freedom of self-government, the freedom to obey consciously the laws of the universe as revealed by reason. He believed that the welfare of each individual should properly be regarded as an end in itself and that the world was progressing toward an ideal society in which reason would “bind every law giver to make his laws in such a way that they could have sprung from the united will of an entire people, and to regard every subject, in so far as he wishes to be a citizen, on the basis of whether he has conformed to that will.” In his treatise Perpetual Peace (1795) Kant advocated the establishment of a world federation of republican states.
Kant had a greater influence than any other philosopher of modern times. Kantian philosophy, particularly as developed by the German philosopher G.W.F. Hegel, was the basis on which the structure of Marxism was built; the dialectical method, used by both Hegel and Karl Marx, was an outgrowth of the method of reasoning by “antinomies” that Kant used. The German philosopher Johann Fichte, Kant's pupil, rejected his teacher's division of the world into objective and subjective parts and developed an idealistic philosophy that also had great influence on 19th-century socialists. One of Kant's successors at the University of Königsberg, J.F. Herbart, incorporated some of Kant's ideas in his system of pedagogy.
http://www.connect.net/ron/kant.html
According to Kant and his philosophy there are no absolutes and therefore everything is relative to the pereceptions of the observer. This is the height of RELATIVISM.... According to him we cannot even conclude that we exist here in this time or dimmension, that would be something that is a perception as well ....
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