It is probably not the case that Jeff moved to the garden. We believe that Greg is white. It is probably the case that Winona is a sheep. It is improbable that if 'Greg is white' or 'Winona is a sheep' or both then Julius is a lion. Chances are about even that if 'Jeff moved to the garden' or 'Winona is a sheep' or both then Lily is yellow. It is highly unlikely that if 'Winona is a sheep and Greg is white' then John discarded the milk.
It is almost certain that 'Lily is yellow and Winona is a sheep'.
It is probably not the case that 'Lily is yellow and Winona is a sheep'.
It is almost certain that 'Lily is yellow and Winona is a sheep'.

  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.
  0.7::factC.
  %hop1
  0.1::factX:-or(factB,factC).
  0.5::factY:-or(factA,factC).
  0.05::factZ:-and(factC,factB).

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

  query(conclusion).
  
'Lily is yellow and Winona is a sheep'.