It is highly unlikely that Gertrude is a mouse. It is impossible that John picked up the apple. It is improbable that Lily is a swan. It is impossible that if 'Gertrude is a mouse and Lily is a swan' then Jessica is a cat. There is almost no chance that if either 'Gertrude is a mouse' or 'Lily is a swan' but not both then Bernhard is gray. It is certain that if 'John picked up the apple and Lily is a swan' then Daniel got the football.
It is probably the case that 'Jessica is a cat and Daniel got the football'.
It is impossible that 'Jessica is a cat and Daniel got the football'.
It is probably the case that 'Jessica is a cat and Daniel got the football'.

  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
  0.05::factA.
  0.0::factB.
  0.1::factC.
  %hop1
  0.0::factX:-and(factA,factC).
  0.02::factY:-xor(factA,factC).
  1.0::factZ:-and(factB,factC).

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

  query(conclusion).
  
'Jessica is a cat and Daniel got the football'.