Backward Reasoning

     Most of the time we do something then we try to justify it with a reason than actually taking a decision based on proper reasoning.
     I read in some book by scott adams that in a controlled lab environment it was proven that in the mind the part which is responsible for reasoning will react way later compared to the part responsible for the action, which means we continue to do actions randomly and then try to make up reasons for the actions already done , which is quite disturbing and  I personally can not fully believe .But I can see many of us do this to some extent.
     The classic example for this is , in 'saving private ryan' movie when the Tom hanks troop has been sent to save one soldier,In a discussion Tom hanks will say that Ryan should become some scientist or save many  lives to justify the effort they are putting. Even though he is not having any idea whom they are going to save and he is doing that only because he was given orders ..But that wont stop him reasoning to justify his actions..
     No matter how stupid the action seems to you , if you ask the person he will tell you a fascinating reason. I don't think the followers of the raj thakray  or telangana activists will think they are stupid. They typically believe they have a solid reason behind their actions.
     It is very helpful to understand the backward reasoning as it is  one of the trap's that our mind plays on us.Whenever we make any mistake instead of rectifying it we will continue to find reasons to justify our actions. It would be better if we understand that we made mistake and focus on how to rectify the same.