It is likely that Brian is yellow. We doubt that Julius is a rhino. It is almost certain that Gertrude is a cat. It is almost certain that if 'Julius is a rhino and Gertrude is a cat' then Yann is hungry. It is likely that if either 'Julius is a rhino' or 'Gertrude is a cat' but not both then Emily is a wolf. There is little chance that if either 'Julius is a rhino' or 'Gertrude is a cat' but not both then Greg is green.
It is impossible that 'Emily is a wolf and Yann is hungry'.
It is impossible that 'Emily is a wolf and Yann is hungry'.
It is probably the case that 'Emily is a wolf and Yann is hungry'.

  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.
  0.2::factB.
  0.95::factC.
  %hop1
  0.95::factX:-and(factB,factC).
  0.7::factY:-xor(factB,factC).
  0.1::factZ:-xor(factB,factC).

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

  query(conclusion).
  
'Emily is a wolf and Yann is hungry'.