Final answer:
The decrease in emotional feeling and expression can negatively impact thinking and reasoning. According to Antonio Damasio's findings, emotions are essential for rational thought and inform our decision-making processes.
Step-by-step explanation:
The decrease in emotional feeling and expression can significantly affect a person's thinking and reasoning. Neuroscientist Antonio Damasio's work suggests that emotions play a critical role in rational thought. Contrary to the traditional belief that emotions interfere with rationality, Damasio found that emotions are integral to the reasoning process. In his book Descartes' Error, he points out that philosophers have historically underestimated the importance of emotions in thought processes. His clinical experience showed that emotions inform and guide rational thoughts, arguing that we think most effectively when we are emotionally engaged. Without emotions, our capacity for rational thought drops, making us less rational rather than more.