It is highly likely that Brian is gray. There is little chance that Greg is a rhino. It is almost certain that Lily is a lion. There is almost no chance that if either 'Lily is a lion' or 'Greg is a rhino' but not both then Emily is a mouse. It is unlikely that if 'Brian is gray' or 'Greg is a rhino' or both then Daniel dropped the milk. It is highly likely that if 'Lily is a lion' or 'Brian is gray' or both then John went to the office.
It is probably the case that 'Daniel dropped the milk and Lily is a lion'.
We doubt that 'Daniel dropped the milk and Lily is a lion'.
It is probably the case that 'Daniel dropped the milk and Lily 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
  0.9::factA.
  0.1::factB.
  0.95::factC.
  %hop1
  0.02::factX:-xor(factC,factB).
  0.2::factY:-or(factA,factB).
  0.9::factZ:-or(factC,factA).

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

  query(conclusion).
  
'Daniel dropped the milk and Lily is a lion'.