It is likely that Lily is yellow. It is probably not the case that John went to the garden. Chances are about even that Bernhard is a lion. It is improbable that if 'John went to the garden' or 'Bernhard is a lion' or both then Sandra took the football. There is a better than even chance that if 'Lily is yellow and John went to the garden' then Brian is a rhino. We doubt that if either 'John went to the garden' or 'Lily is yellow' but not both then Daniel dropped the apple.
There is a better than even chance that 'Brian is a rhino' or 'Bernhard is a lion' or both.
There is a better than even chance that 'Brian is a rhino' or 'Bernhard is a lion' or both.
Chances are slight that 'Brian is a rhino' or 'Bernhard 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
  0.7::factA.
  0.25::factB.
  0.5::factC.
  %hop1
  0.1::factX:-or(factB,factC).
  0.6::factY:-and(factA,factB).
  0.2::factZ:-xor(factB,factA).

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

  query(conclusion).
  
'Brian is a rhino' or 'Bernhard is a lion' or both.