It is probably not the case that John moved to the office. We believe that Emily is a cat. It is almost certain that Mary grabbed the milk. It is likely that if 'Emily is a cat' or 'Mary grabbed the milk' or both then Bernhard is green. It is highly likely that if 'John moved to the office' or 'Emily is a cat' or both then Lily is a frog. There is a better than even chance that if 'Mary grabbed the milk and John moved to the office' then Julius is a rhino.
We believe that 'Lily is a frog' or 'Julius is a rhino' or both.
We believe that 'Lily is a frog' or 'Julius is a rhino' or both.
It is improbable that 'Lily is a frog' or 'Julius 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
  0.25::factA.
  0.75::factB.
  0.95::factC.
  %hop1
  0.7::factX:-or(factB,factC).
  0.9::factY:-or(factA,factB).
  0.6::factZ:-and(factC,factA).

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

  query(conclusion).
  
'Lily is a frog' or 'Julius is a rhino' or both.