WordNet
law of similarity
n. a Getalt principle of organization holding that (other things being equal) parts of a stimulus field that are similar to each other tend to be perceived as belonging together as a unit [syn: similarity]
Usage examples of "law of similarity".
It was delicious, nothing like the reconstituted stuff that makes a liar of the law of similarity.
Anyway, this Polish sorcerer saw that this Paul chap was a dead ringer for My Lord Marquis and decided to use him to control My Lord Marquis -- Law of Similarity, d' ye see.