Chances are slight that Winona is a mouse. Chances are about even that Bernhard is white. There is almost no chance that John got the apple. There is a better than even chance that if 'Winona is a mouse and John got the apple' then Jessica is a cat. It is likely that if either 'Bernhard is white' or 'John got the apple' but not both then Lily is a frog. There is a very good chance that if 'Winona is a mouse and Bernhard is white' then Brian is a rhino.
It is impossible that 'Jessica is a cat and Winona is a mouse'.
It is impossible that 'Jessica is a cat and Winona is a mouse'.
There is a better than even chance that 'Jessica is a cat and Winona is a mouse'.

  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
  0.1::factA.
  0.5::factB.
  0.02::factC.
  %hop1
  0.6::factX:-and(factA,factC).
  0.7::factY:-xor(factB,factC).
  0.8::factZ:-and(factA,factB).

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

  query(conclusion).
  
'Jessica is a cat and Winona is a mouse'.