Nick makes up a new word for "pen", and believes its wide acceptance 'proves' words are mere convention.
In grade five, Nick interprets “we decide new words” as meaning words are assigned to things arbitrarily. Believing he and his friends can make a new word, he invents “frindle” to replace “pen”. His perseverance gains media attention so widely that the word eventually appears in a dictionary. This story of word origins is as convincing as it is damaging to children. Frindle should only be used as an example of literary casuistry.