It is probably the case that Emily is a mouse. It is certain that Brian is a frog. We doubt that Yann is tired. It is probably not the case that if either 'Brian is a frog' or 'Yann is tired' but not both then Lily is yellow. It is probably the case that if either 'Emily is a mouse' or 'Brian is a frog' but not both then Bernhard is green. There is almost no chance that if either 'Yann is tired' or 'Emily is a mouse' but not both then Greg is a swan.
We doubt that either 'Bernhard is green' or 'Emily is a mouse' but not both.
It is highly likely that either 'Bernhard is green' or 'Emily is a mouse' but not both.
We doubt that either 'Bernhard is green' or 'Emily is a mouse' but not both.

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

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

  query(conclusion).
  
Either 'Bernhard is green' or 'Emily is a mouse' but not both.