It is unlikely that Daniel dropped the apple. It is highly likely that Winona is a sheep. It is probably the case that Lily is a frog. It is probably not the case that if either 'Daniel dropped the apple' or 'Lily is a frog' but not both then Sandra left the milk. It is likely that if 'Daniel dropped the apple and Winona is a sheep' then Jessica is a mouse. It is highly unlikely that if 'Lily is a frog and Winona is a sheep' then John went to the hallway.
It is unlikely that 'Daniel dropped the apple and Winona is a sheep'.
It is unlikely that 'Daniel dropped the apple and Winona is a sheep'.
It is probable that 'Daniel dropped the apple 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
  0.2::factA.
  0.9::factB.
  0.7::factC.
  %hop1
  0.25::factX:-xor(factA,factC).
  0.7::factY:-and(factA,factB).
  0.05::factZ:-and(factC,factB).

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

  query(conclusion).
  
'Daniel dropped the apple and Winona is a sheep'.