Associative arguments based on analogy are very common, and the use of metaphors in different ways is an important element in the argumentation. He refers to a metaphor as dormant when it is detached from its origin and it forms an invisible fusion. The argumentative power of the dormant metaphor is often sufficient in itself, and there is no more need for argumentation. It is interesting to note that while Perelman rejects all absolute and dogmatic ideas, he also does not support absolute relativism. While rejecting the existence of absolute truth, it constitutes a method for enlightened practical activities.
Truth is only the process of approaching it.
Perelman continously repeats that a fact cannot live autonomously. A fact without the power of reason behind it cannot survive by itself. Rhetoric favours reasonable compromises that are instruments and generators of further evolution. The statement that facts do not speak for themselves has obvious ethical implications. Demonstration employs a formal language or imitates one.