It is likely that Lily is a rhino. Chances are slight that Emily is a wolf. We believe that Gertrude is a mouse. It is unlikely that if 'Emily is a wolf' or 'Lily is a rhino' or both then John moved to the garden. There is little chance that if 'Gertrude is a mouse and Lily is a rhino' then Bernhard is a frog. There is a better than even chance that if 'Lily is a rhino and Gertrude is a mouse' then Julius is a lion.
There is almost no chance that 'Lily is a rhino' or 'Emily is a wolf' or both.
We believe that 'Lily is a rhino' or 'Emily is a wolf' or both.
There is almost no chance that 'Lily is a rhino' or 'Emily is a wolf' or both.

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

  %hop2
  conclusion:-or(factA,factB).

  query(conclusion).
  
'Lily is a rhino' or 'Emily is a wolf' or both.