The intimate relationship between language and thought is illustrated by the use of words, which cause thought mechanisms to engage, and in turn these mechanisms cause the thought processes to choose the words we speak. Sanford explains that many language processing inferences are made along with the text of spoken words. Knowledge of the world is a prerequisite to understanding language. A mental model, therefore, can provide a context for understanding, but it can also rule out other ways of thinking. The metaphors people use set the tracks along which thoughts and beliefs will tend to run.
Language restricts thoughts just as thoughts manifest in language.
In order to intuitively grasp something , to have the feeling we understand something without having consciously done much thinking about it, we must have mapped onto some pre-existing model. The point of this chapter is that many times heuristic thinking in fact leads to fallacy. Understanding that our intuitions are fallible is important because only by realizing that we are fallible will we make the effort to question ourselves and seek others' opinions. Not only are we fallible, we really don't think logically either. Logic is a discipline in philosophy which is concerned with the kinds of conclusions that follow from a set of premises.