Three letter rule poets such as John Milton alternated between short and long forms for function words, depending on whether they occurred on or off the meter. For instance: While many function words have more than two letters ("and", "she", "were", "therefore", etc.), the exceptions to the rule are rather two-letter content words. Only a few of these occur commonly in most texts: the words "go" (which also has a functional usage in the idiom "going to do something"), "ox" and, especially in American texts, "ax". English grammar is relatively flexible about converting words of one class to another, allowing verbal uses such
Word recognition reduce activation to words in one's memory with a dissimilar appearance. This neural strengthening of connections to relevant letters and words, as well as the simultaneous weakening of associations with irrelevant ones, eventually activates the correct word as part of word recognition in the neural network. Using positron emission tomography (PET) scans and event-related potentials, researchers have located two separate areas in the fusiform gyrus that respond specifically to strings of letters. The posterior fusiform gyrus responds to words and non-words, regardless of their semantic context. The anterior fusiform gyrus is affected by the semantic context, and whether letter combinations