The characteristic of the human imagination is a survival aptitude principle. Survival is directly linked to knowing the environment that surrounds it, and getting rid of mechanisms that harm the individual.
So the human brain is able to make variations of what to observe and create scenes, or concepts that were not observed, or that they did not know. And these concepts are tested to define that what was imagined is confirmed to be what was tested.
This is basically the foundation of empirical science. But it is the basis for scientific knowledge. In scientific knowledge, what you have are lines of imagination directed to a specific problem.
The fundamental concept of relative truth is linked to this variation of reality, and stipulates an end in itself, when its foundation is congruence with external truth.
Our digestive system produces several enzymes, and these enzymes have the function of digesting food for later absorption. The relative truth would be like defining that such enzymes are for themselves, so they don't need to feed.
What would make the individual die. As the function of digestive enzymes is for the food to be digested, reality variation exists for the attempt to detect the absolute truth.
As the characteristic of absolute truth is found in not following the human will, then the creation of relative truths that satisfy man, generates the will to make the variation of reality accepted, on the same level as the empirical Reality.
This factor is merely an escape from reality, to seek an illusion that favors the individual's pleasure.
When the foundation that the variations of reality are mere illusions is lost, the proportion that this loss develops, society manages the classification of the individual, as crazy, when passing from a level of acceptance of illusions.
Descartes says, if I think then I am, but thought is usually reactive. An action generates a construction of thought. But the only factor in the development of thought is logic. Logic manages the system of absolute truth, and irrationality the construction of the basis of relative truth.
While logic can be created above imagined bases in relative truth, those same bases lose logic in trying to analyze what is supporting them.
Likewise, an imaginary world may have bases in its existence, but it has no rationale to justify its bases.
Naturally, a medical system, or the operation of a nuclear power plant, is intimately linked to solid foundations of detectable fundamentals, not to varying imaginations. The use of varied imaginations in the control of a nuclear power plant leads to the destruction of that power plant.
Thus society tends to say, or to define, at which points the sciences based on absolute truth are used, and at which points the sciences based on relative truth are used.
In fact, society is forced to accept fundamentals of absolute truth, when the violation of absolute truth comes to life-threatening points for people, or society.
In these cases, truth based on empirical scientific experience is defined as norms, and ideologies based on social concepts are prohibited.
