Can it be that you don't understand an analogy?...
"Analogy" - noun
A comparison between one thing and another, typically for the purpose of explanation or clarification.
"an analogy between the workings of nature and those of human societies"
A correspondence or partial similarity.
"the syndrome is called deep dysgraphia because of its analogy to deep dyslexia"
A thing which is comparable to something else in significant respects.
"works of art were seen as an analogy for works of nature"
LOGIC:
A process of arguing from similarity in known respects to similarity in other respects.
"argument from analogy"
Synonyms: similarity, parallel, parallelism, correspondence, likeness, resemblance, correlation, relation, kinship, equivalence, similitude, symmetry, homology
"an analogy between the workings of nature and those of human societies"
antonyms: dissimilarity