Information studies is still facing some fundamental isssues unsolved satisfactory. The variety of definitions for information is one of them. Some researchers think the universal definition of information, and therefore the unified theory of information, impossible.

This may be true if the efforts are made only by scientific researchers alone. However, the situation may change if the efforts will be made by the good collaboration between information scientists and information philosophers. 

This article will show that, by employing the proper methodology, one kind of the principle of philosophy, the problem of variety in information definition may find better solution.