It is unlikely that Bernhard is green. It is unlikely that Jessica is a cat. It is unlikely that Brian is yellow. It is probably the case that if either 'Bernhard is green' or 'Jessica is a cat' but not both then Bill moved to the office. We doubt that if 'Jessica is a cat' or 'Brian is yellow' or both then Greg is a frog. It is probably the case that if either 'Bernhard is green' or 'Jessica is a cat' but not both then Julius is a swan.
It is probable that 'Bernhard is green and Greg is a frog'.
There is almost no chance that 'Bernhard is green and Greg is a frog'.
It is probable that 'Bernhard is green and Greg is a frog'.

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

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

  query(conclusion).
  
'Bernhard is green and Greg is a frog'.