It is probably the case that Mary went to the kitchen. There is almost no chance that John dropped the milk. It is highly unlikely that Lily is a lion. We doubt that if either 'Mary went to the kitchen' or 'John dropped the milk' but not both then Antoine is hungry. There is a better than even chance that if 'Mary went to the kitchen and Lily is a lion' then Sandra left the football. It is probable that if 'John dropped the milk and Lily is a lion' then Brian is green.
There is a very good chance that 'Antoine is hungry and Sandra left the football'.
It is impossible that 'Antoine is hungry and Sandra left the football'.
There is a very good chance that 'Antoine is hungry and Sandra left the football'.

  and(A,B) :- A,B.
  or(A,B) :- A;B.
  nand(A,B) :- not(and(A,B)).
  nor(A,B) :- not(or(A,B)).
  xor(A,B) :- or(A,B), nand(A,B).

  %hop0
  0.7::factA.
  0.02::factB.
  0.05::factC.
  %hop1
  0.2::factX:-xor(factA,factB).
  0.6::factY:-and(factA,factC).
  0.7::factZ:-and(factB,factC).

  %hop2
  conclusion:-and(factX,factY).

  query(conclusion).
  
'Antoine is hungry and Sandra left the football'.