It is likely that Lily is a rhino. Chances are slight that Greg is a swan. It is probably the case that Mary went to the garden. There is almost no chance that if 'Mary went to the garden' or 'Lily is a rhino' or both then Emily is a wolf. Chances are about even that if either 'Greg is a swan' or 'Mary went to the garden' but not both then Brian is a frog. It is highly unlikely that if 'Lily is a rhino and Greg is a swan' then Bernhard is a lion.
It is probable that 'Emily is a wolf' or 'Brian is a frog' or both.
It is probably not the case that 'Emily is a wolf' or 'Brian is a frog' or both.
It is probable that 'Emily is a wolf' or 'Brian 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.
  0.1::factB.
  0.7::factC.
  %hop1
  0.02::factX:-or(factC,factA).
  0.5::factY:-xor(factB,factC).
  0.05::factZ:-and(factA,factB).

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

  query(conclusion).
  
'Emily is a wolf' or 'Brian is a frog' or both.