There is little chance that Lily is a swan. It is probably the case that Bernhard is a lion. There is a better than even chance that Julius is a rhino. It is improbable that if either 'Julius is a rhino' or 'Lily is a swan' but not both then Jason is tired. We believe that if 'Bernhard is a lion' or 'Lily is a swan' or both then Daniel took the apple. Chances are about even that if 'Bernhard is a lion and Lily is a swan' then Brian is yellow.
Chances are about even that 'Julius is a rhino and Bernhard is a lion'.
Chances are about even that 'Julius is a rhino and Bernhard is a lion'.
It is certain that 'Julius is a rhino and Bernhard is a lion'.

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

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

  query(conclusion).
  
'Julius is a rhino and Bernhard is a lion'.