Chances are about even that Lily is a lion. It is probably the case that Brian is a rhino. We believe that John went to the garden. It is unlikely that if 'Brian is a rhino' or 'Lily is a lion' or both then Jessica is a mouse. It is unlikely that if either 'Brian is a rhino' or 'Lily is a lion' but not both then Julius is white. There is a very good chance that if 'Lily is a lion' or 'John went to the garden' or both then Mary grabbed the milk.
It is highly likely that 'John went to the garden' or 'Lily is a lion' or both.
It is highly likely that 'John went to the garden' or 'Lily is a lion' or both.
It is impossible that 'John went to the garden' or 'Lily is a lion' 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
  0.5::factA.
  0.7::factB.
  0.75::factC.
  %hop1
  0.2::factX:-or(factB,factA).
  0.2::factY:-xor(factB,factA).
  0.8::factZ:-or(factA,factC).

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

  query(conclusion).
  
'John went to the garden' or 'Lily is a lion' or both.