It is probable that Bill went to the garden. It is probably not the case that Brian is a rhino. There is almost no chance that Sandra left the milk. It is probable that if 'Brian is a rhino and Bill went to the garden' then Julius is a lion. It is highly likely that if 'Bill went to the garden and Sandra left the milk' then Bernhard is a swan. There is almost no chance that if 'Bill went to the garden and Brian is a rhino' then Lily is a frog.
It is likely that 'Bill went to the garden' or 'Lily is a frog' or both.
It is likely that 'Bill went to the garden' or 'Lily is a frog' or both.
There is almost no chance that 'Bill went to the garden' or 'Lily is a frog' 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.
  0.02::factC.
  %hop1
  0.7::factX:-and(factB,factA).
  0.9::factY:-and(factA,factC).
  0.02::factZ:-and(factA,factB).

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

  query(conclusion).
  
'Bill went to the garden' or 'Lily is a frog' or both.