There is almost no chance that Gertrude is a cat. There is a very good chance that Brian is yellow. There is a better than even chance that Julius is a lion. It is unlikely that if either 'Gertrude is a cat' or 'Julius is a lion' but not both then Jeff went to the bedroom. It is likely that if 'Brian is yellow and Gertrude is a cat' then Greg is a swan. There is a better than even chance that if 'Brian is yellow' or 'Julius is a lion' or both then Emily is a wolf.
There is almost no chance that 'Gertrude is a cat and Emily is a wolf'.
There is almost no chance that 'Gertrude is a cat and Emily is a wolf'.
It is almost certain that 'Gertrude is a cat and Emily 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
  0.02::factA.
  0.8::factB.
  0.6::factC.
  %hop1
  0.2::factX:-xor(factA,factC).
  0.7::factY:-and(factB,factA).
  0.6::factZ:-or(factB,factC).

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

  query(conclusion).
  
'Gertrude is a cat and Emily is a wolf'.