Definition: A situation and its surprising or counter-intuitive response.
Conjunctions: and, etc.
Distinctions: Progression, Action-Result, Concessive (Hover over a relationship to see how it differs.)
Progression (P) vs Situation-Response (Sit/R)
Often times it is difficult to know how to relate the elements of a dialog.
The first thing you want to do is decide whether you are going to arc it with focus on the author's intent or with focus on the motives of the dialoging individuals. (Both can be helpful.) Where you land on this decision will likely determine your use of Progression (the author progressing his purpose along via the elements of the dialog) or Situation-Response (those in the dialog responding to one another).
Action-Result (Ac/Res) vs Situation-Response (Sit/R)
To determine a relationship to be Situation-Response over Action-Result, look for the contrary or surprising nature of the response.
Additionally, these two logical relationships differ in where they emphasize volition. With Action-Result, the action is most often that of a person, with the result being the natural consequence. With Situation-Response, the emphasis of choice falls more upon the response.
Bill went sailing when it was not windy and got stuck on the lake. (Action-Result)
Even though it was not windy out, Bill still went sailing. (Situation-Response)
Concessive (Csv) vs Situation-Response (Sit/R)
The primary difference between these two relationships is one of emphasis. With Concessive, the stress is that something is true despite the fact of a reality that seems to contradict at first glance. With Situation-Response, on the other hand, we find an emphasis placed on someone's surprising response to a situation.
I am not hungry, but I do still want to eat. (Concessive)
It was an all-you-can-eat buffet, but I did not each much. (Situation-Response)