It is highly unlikely that Bernhard is yellow. There is a better than even chance that Jeff moved to the garden. It is probably the case that Greg is white. There is a better than even chance that if 'Jeff moved to the garden' or 'Greg is white' or both then Sandra left the milk. Chances are slight that if 'Bernhard is yellow and Jeff moved to the garden' then Gertrude is a sheep. There is a very good chance that if either 'Greg is white' or 'Jeff moved to the garden' but not both then Mary went to the hallway.
It is likely that 'Sandra left the milk and Jeff moved to the garden'.
It is probably not the case that 'Sandra left the milk and Jeff moved to the garden'.
It is likely that 'Sandra left the milk and Jeff moved to the garden'.

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

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

  query(conclusion).
  
'Sandra left the milk and Jeff moved to the garden'.