The shift point is this state behind what it is impossible apply the the character of revesibility. It can be interresting to figure out where exactly this shift point is located for any domains in our lives because this can give the understand of something invisible in our interractions and in our actions.

For certain aspects, the shift point is very present and is a very key for take decision, but for others, only clever guys can see that and then, get a head start.