It is impossible that Winona is a mouse. It is likely that John went to the kitchen. It is highly unlikely that Lily is yellow. It is impossible that if 'Winona is a mouse' or 'Lily is yellow' or both then Mary dropped the milk. There is a better than even chance that if 'Winona is a mouse' or 'John went to the kitchen' or both then Julius is a frog. We doubt that if 'John went to the kitchen and Winona is a mouse' then Greg is a swan.
It is highly unlikely that 'Julius is a frog' or 'John went to the kitchen' or both.
It is likely that 'Julius is a frog' or 'John went to the kitchen' or both.
It is highly unlikely that 'Julius is a frog' or 'John went to the kitchen' 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
  0.0::factA.
  0.7::factB.
  0.05::factC.
  %hop1
  0.0::factX:-or(factA,factC).
  0.6::factY:-or(factA,factB).
  0.2::factZ:-and(factB,factA).

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

  query(conclusion).
  
'Julius is a frog' or 'John went to the kitchen' or both.