There is almost no chance that Jessica is a sheep. It is probable that Bernhard is a frog. Chances are slight that Julius is gray. There is little chance that if either 'Bernhard is a frog' or 'Julius is gray' but not both then Mary went to the kitchen. It is highly unlikely that if either 'Jessica is a sheep' or 'Bernhard is a frog' but not both then Jeff dropped the apple. It is impossible that if 'Bernhard is a frog' or 'Jessica is a sheep' or both then John moved to the garden.
It is impossible that 'John moved to the garden and Jessica is a sheep'.
It is impossible that 'John moved to the garden and Jessica is a sheep'.
It is probably the case that 'John moved to the garden and Jessica is a sheep'.

  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.
  0.7::factB.
  0.1::factC.
  %hop1
  0.1::factX:-xor(factB,factC).
  0.05::factY:-xor(factA,factB).
  0.0::factZ:-or(factB,factA).

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

  query(conclusion).
  
'John moved to the garden and Jessica is a sheep'.