It is highly likely that Bernhard is a rhino. It is probably the case that Lily is a lion. Chances are slight that John left the football. It is improbable that if 'Bernhard is a rhino' or 'Lily is a lion' or both then Brian is a frog. It is probably the case that if 'Bernhard is a rhino and Lily is a lion' then Antoine is hungry. It is impossible that if either 'John left the football' or 'Bernhard is a rhino' but not both then Mary went to the garden.
It is almost certain that 'Antoine is hungry and Lily is a lion'.
Chances are about even that 'Antoine is hungry and Lily is a lion'.
It is almost certain that 'Antoine is hungry and Lily is a lion'.

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

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

  query(conclusion).
  
'Antoine is hungry and Lily is a lion'.