It is unlikely that John left the football. We believe that Lily is a rhino. It is probably the case that Brian is a swan. It is unlikely that if either 'Brian is a swan' or 'John left the football' but not both then Bernhard is green. There is little chance that if either 'Brian is a swan' or 'Lily is a rhino' but not both then Emily is a wolf. There is a better than even chance that if 'Brian is a swan and Lily is a rhino' then Mary went to the kitchen.
It is almost certain that 'Brian is a swan and Bernhard is green'.
There is little chance that 'Brian is a swan and Bernhard is green'.
It is almost certain that 'Brian is a swan and Bernhard is green'.

  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
  0.2::factA.
  0.75::factB.
  0.7::factC.
  %hop1
  0.2::factX:-xor(factC,factA).
  0.1::factY:-xor(factC,factB).
  0.6::factZ:-and(factC,factB).

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

  query(conclusion).
  
'Brian is a swan and Bernhard is green'.