It is likely that Greg is a rhino. We doubt that Brian is a frog. It is likely that Lily is white. Chances are about even that if 'Brian is a frog and Greg is a rhino' then Antoine is bored. It is probably the case that if either 'Lily is white' or 'Greg is a rhino' but not both then Mary dropped the milk. There is a better than even chance that if 'Brian is a frog and Greg is a rhino' then John left the football.
It is probable that 'Antoine is bored and Greg is a rhino'.
It is highly unlikely that 'Antoine is bored and Greg is a rhino'.
It is probable that 'Antoine is bored and Greg is a rhino'.

  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.
  0.2::factB.
  0.7::factC.
  %hop1
  0.5::factX:-and(factB,factA).
  0.7::factY:-xor(factC,factA).
  0.6::factZ:-and(factB,factA).

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

  query(conclusion).
  
'Antoine is bored and Greg is a rhino'.