Probable Worlds
Probabilistic semantics:
n
A set of possible worlds
n
Each world associated with a probability
hard
smart
C
hard
weak
C
easy
smart
C
easy
weak
C
C students
Probability theory is nothing but
common sense reduced to calculation.
Pierre Simon Laplace
Thus, we can see that it is unlikely for a smart student to get a C in an easy class.
And the same model can be used to tell us that, although it is possible for a C student to be smart, it is not very likely.