It is highly likely that Greg is a rhino. It is probable that John went to the hallway. It is unlikely that Daniel took the milk. It is impossible that if either 'Daniel took the milk' or 'Greg is a rhino' but not both then Emily is a wolf. Chances are about even that if 'Greg is a rhino' or 'John went to the hallway' or both then Brian is a lion. It is impossible that if 'John went to the hallway' or 'Greg is a rhino' or both then Bernhard is a swan.
It is impossible that 'Greg is a rhino and Emily is a wolf'.
It is impossible that 'Greg is a rhino and Emily is a wolf'.
It is almost certain that 'Greg is a rhino and Emily is a wolf'.

  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
  0.9::factA.
  0.7::factB.
  0.2::factC.
  %hop1
  0.0::factX:-xor(factC,factA).
  0.5::factY:-or(factA,factB).
  0.0::factZ:-or(factB,factA).

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

  query(conclusion).
  
'Greg is a rhino and Emily is a wolf'.