Clark

In Clark's article he states that there are three principles involved in children inferring and and creating new identifiers. 

The first principle -- the principle of semantic relativity -- suggests that children give preference to words that are familiar when they are creating new word forms. These word forms are often created by adding the suffix -er to the words that they know. Someone who is eating is an "eater".The second principle -- productivity -- suggests that children are constantly looking to increase their vocabularies by picking up new conventions. However, they may not always use these conventions correctly. The third principle -- conventionality -- suggests that while children are constantly trying to grow their repertoire, they still show preference to conventional word forms. 

This article shows that part of the beauty and utility of language is its fluidity and imprecision. Both children and adults are able to understand words and ideas that they don't technically know. We can communicate effectively and convey the ideas and nature of things without having a dictionary definition of them in our minds.