It is highly unlikely that Daniel left the football. It is probable that Lily is a frog. It is almost certain that John grabbed the apple. Chances are slight that if 'Lily is a frog' or 'John grabbed the apple' or both then Mary went to the bedroom. Chances are slight that if 'Lily is a frog' or 'John grabbed the apple' or both then Julius is a rhino. It is probably not the case that if 'Daniel left the football' or 'John grabbed the apple' or both then Bernhard is gray.
It is probably the case that 'Julius is a rhino and John grabbed the apple'.
It is improbable that 'Julius is a rhino and John grabbed the apple'.
It is probably the case that 'Julius is a rhino and John grabbed the apple'.

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

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

  query(conclusion).
  
'Julius is a rhino and John grabbed the apple'.