By comparing the same characteristics of object and subject, this method of argument compares the nature of object with that of subject, thus revealing that subject and object have the same nature, thus achieving the purpose of proof and argument.
The basis of analogical argument is analogical reasoning, which should proceed from facts, return to facts and be tested by facts. Metaphorical argument is based on figurative rhetoric, which is not necessarily true, and a certain situation or image can be reasonably imagined and fictional. Analogy shows the logic and rigor of reasoning. Metaphor argument pays attention to the visualization and concreteness of reasoning.
"The same characteristics" is the premise of analogy.
The "same characteristics" in analogy argument is the premise of this argument method, without which analogy cannot be carried out; "Comparative analogy" is the fundamental symbol of this argument method. Without this reasoning process, the purpose of proving the argument cannot be achieved.
"Known things" is an important condition of this argument method. It is an object that serves the main thing to be discussed. Without this condition, analogy can't be obvious, can't be easily accepted by readers, and can't achieve the purpose of proving the argument in some cases.