>>9211483could = the ability of one to do something— think of this as a nonzero probability state of an action happening or not, denoted by |C>. For an action |A>, there is probability <C|A> that you are able to do it.
should= a social measurement of an action's worth— think of this as an operator acting on a person's action that determines a if an action is going to happen as per the rules of society, with the result being a vector with entries normalized between 0 (always don't do this action) and 1 (always do this action) to determine in which ways (as per choice of basis) this action may or may not happen. That is, if |A> is an action represented by a column vector of the first n most significant factor in the social basis,
|A> is the measurement of if you should or should not do |A>.
Now the distinction between >>9211413 >>9211418 should be quite clear.
>>9211413 describes the vector |A> that evaluates the components of |A> against the social basis of a society, while the value <C|A> simply returns a probability value. 
