It is probably the case that Greg is a swan. It is highly likely that Jessica is a cat. We doubt that Julius is a rhino. It is highly likely that if 'Jessica is a cat' or 'Greg is a swan' or both then Lily is a frog. It is highly likely that if either 'Jessica is a cat' or 'Julius is a rhino' but not both then Brian is yellow. It is probable that if 'Jessica is a cat and Greg is a swan' then Winona is a wolf.
It is probably not the case that 'Brian is yellow and Winona is a wolf'.
It is probably not the case that 'Brian is yellow and Winona is a wolf'.
It is likely that 'Brian is yellow and Winona is a wolf'.

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

  %hop2
  conclusion:-and(factY,factZ).

  query(conclusion).
  
'Brian is yellow and Winona is a wolf'.