An Analytical Result

 A gave a book to B.

This is a typical description of some observed scene.

A gives a book. What is the inception-point of this? The intent in A's mind to give (for whatever specific reason - say, A is B's elder brother who wants his younger brother to read that book).  

Now, there are 3 realms (Minsky, M., The Emotion Machine Chapter 6 pg. 4) - there is the physical motion of the book, the transfer of knowledge, and the transfer of ownership and control. But we dont describe the realms other than the physical transfer, i.e. say things like "A transferred knowledge to B" or "A transferred ownership or control of the book to B". They remain hidden. The physical transfer realm is RESPONSIBLE FOR the other realms; it is the cause of the other realms. 

In the case of the individual (i.e. A) the, the intent/cause is hidden (not described) and the effect is described (by saying that 'A gave a book to B'). Seen from the point of view of the external totality of the event (wherein the realms can be seen to lie), the physical transfer (which is the cause of the other realms) is described and the effects (the other realms) are hidden (not described).

In one reference frame, the description (A gave a book to B) is the effect, in the other it is the cause.

The commonsense in the case of the individual is in the cause. The commonsense in the case of the external totality is in the effect. 

Note : By 'external totality' it is simply meant - seeing the scene from a third person's point of view.