Emotion versus reason
Traditionally, they have been seen as mutually exclusive, and interfering. However, the Somatic Marker hypothesis, "a mechanism by which emotional processes can bias behavior, particularly decision-making", states that this is not necessarily true, and perhaps they can even compliment each other. 

In your opinion, how closely are reason and emotion linked? 

Please provide reasons and examples. Need some more info? Refer to the Section "Ethics" in your ToK textbook. You can also watch this video about Phineas Gage, the man whose case led scientists to study the relationship between the brain and emotions. 

350-400 words