Some simple things, when viewed from different angle, turn out to be pretty complicated.

I was discussing how our brain applies logic, and in general 'achieves objectives set forth'.
Let us take simple example: Suppose I decide to do some activity - say, enjoying the cool breeze from the terrace after the dinner. This thought comes to the mind, the your body ("system") start taking actions such as walking towards the door, wearing slippers, closing the door, and so on.

So we start with "What to do", and the system comes out with "How to do". And then automatically takes over different functionalities to achieve our high level goal. Key