There is almost no chance that Daniel dropped the apple. We doubt that Winona is a mouse. It is unlikely that Lily is gray. It is likely that if 'Daniel dropped the apple and Winona is a mouse' then Greg is a swan. Chances are about even that if 'Daniel dropped the apple and Lily is gray' then Brian is a rhino. We doubt that if 'Daniel dropped the apple and Lily is gray' then Bernhard is green.
It is probably the case that 'Winona is a mouse' or 'Brian is a rhino' or both.
It is unlikely that 'Winona is a mouse' or 'Brian is a rhino' or both.
It is probably the case that 'Winona is a mouse' or 'Brian is a rhino' 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
  0.02::factA.
  0.2::factB.
  0.2::factC.
  %hop1
  0.7::factX:-and(factA,factB).
  0.5::factY:-and(factA,factC).
  0.2::factZ:-and(factA,factC).

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

  query(conclusion).
  
'Winona is a mouse' or 'Brian is a rhino' or both.