Chances are about even that Brian is yellow. We doubt that Jessica is a mouse. There is a better than even chance that Winona is a sheep. It is almost certain that if 'Jessica is a mouse' or 'Winona is a sheep' or both then Bernhard is a rhino. We doubt that if 'Brian is yellow' or 'Winona is a sheep' or both then Julius is white. It is impossible that if 'Winona is a sheep' or 'Brian is yellow' or both then John went to the hallway.
There is a very good chance that 'Bernhard is a rhino and Brian is yellow'.
It is probably not the case that 'Bernhard is a rhino and Brian is yellow'.
There is a very good chance that 'Bernhard is a rhino and Brian is yellow'.

  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
  0.5::factA.
  0.2::factB.
  0.6::factC.
  %hop1
  0.95::factX:-or(factB,factC).
  0.2::factY:-or(factA,factC).
  0.0::factZ:-or(factC,factA).

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

  query(conclusion).
  
'Bernhard is a rhino and Brian is yellow'.