Critical Thinking #3

In the third class of the critical thinking course, we learnt about intermediate conclusions, which lead to a main conclusions. An intermediate conclusion(IC) has its own supporting reason(s). It is both a conclusion and a reason for a further conclusion. An example is:

R1: In a number of countries, cars drive on the left
R2: This can result in accident involving drivers and pedestrians from other countries who are used to traffic being on the right.
IC: R3: Road would be safe if in all countries the rules were same.
R4: Countries where cars keep to the left are in very small minority.
C: Those countries should change to the right.

So here is a preliminary argument, R1 and R2     > R3 and IC, linking to a second argument R3 and R4                   > C. This means R3 is an intermediate conclusion and also a reason.