It is likely that Sandra left the football. It is probably not the case that Lily is a frog. It is probably not the case that Bernhard is yellow. It is improbable that if 'Lily is a frog' or 'Bernhard is yellow' or both then Julius is a lion. It is certain that if 'Lily is a frog and Sandra left the football' then Mary went to the garden. It is improbable that if 'Sandra left the football' or 'Bernhard is yellow' or both then Greg is a rhino.
It is impossible that 'Julius is a lion' or 'Sandra left the football' or both.
It is probably the case that 'Julius is a lion' or 'Sandra left the football' or both.
It is impossible that 'Julius is a lion' or 'Sandra left the football' or both.

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

  %hop2
  conclusion:-or(factX,factA).

  query(conclusion).
  
'Julius is a lion' or 'Sandra left the football' or both.