This is the rarest mode of thinking. In this mode, the individual, in the process of forming an opinion, examines carefully all of the facts of the matter, forms a hypothesis, and then attempts to disprove his own hypothesis. After a certain amount of rigorous examination and refutation of his own hypothesis, he may or may not conclude that the hypothesis is sound. If the hypothesis does not survive close examination and refutation, it is discarded and a new hypothesis is formed.
Sentiment is the foundation of all thought, it is the motive force behind thought.
So, even before the hypothesis is formed, there is sentiment, but there are competing sentiments. It is the hallmark of the rational mind to allow reason to be the justification for sentiment. This is by far, the most common form of thinking. This is an inferior and primitive form of thinking. People who use mode2 thinking are easily susceptible to imagery and pandering.