It is probably not the case that Emily is a wolf. It is almost certain that Sandra left the football. It is certain that Greg is a frog. There is almost no chance that if 'Emily is a wolf and Sandra left the football' then Winona is a mouse. We believe that if 'Sandra left the football and Emily is a wolf' then Mary moved to the garden. It is unlikely that if 'Emily is a wolf' or 'Sandra left the football' or both then Lily is a rhino.
It is probably not the case that 'Sandra left the football' or 'Winona is a mouse' or both.
It is almost certain that 'Sandra left the football' or 'Winona is a mouse' or both.
It is probably not the case that 'Sandra left the football' or 'Winona is a mouse' 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.
  0.95::factB.
  1.0::factC.
  %hop1
  0.02::factX:-and(factA,factB).
  0.75::factY:-and(factB,factA).
  0.2::factZ:-or(factA,factB).

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

  query(conclusion).
  
'Sandra left the football' or 'Winona is a mouse' or both.