It is improbable that Winona is a wolf. It is highly likely that Lily is a frog. It is probable that Brian is green. It is almost certain that if 'Lily is a frog' or 'Winona is a wolf' or both then Sandra dropped the apple. It is highly unlikely that if either 'Lily is a frog' or 'Winona is a wolf' but not both then Greg is a frog. It is almost certain that if either 'Lily is a frog' or 'Brian is green' but not both then Bernhard is a rhino.
It is highly unlikely that 'Sandra dropped the apple and Greg is a frog'.
It is highly unlikely that 'Sandra dropped the apple and Greg is a frog'.
It is probable that 'Sandra dropped the apple and Greg is a frog'.

  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
  0.1::factA.
  0.9::factB.
  0.7::factC.
  %hop1
  0.95::factX:-or(factB,factA).
  0.05::factY:-xor(factB,factA).
  0.95::factZ:-xor(factB,factC).

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

  query(conclusion).
  
'Sandra dropped the apple and Greg is a frog'.