It is unlikely that Emily is a mouse. We doubt that Julius is a rhino. It is probably the case that Mary got the football. It is likely that if 'Mary got the football and Emily is a mouse' then Daniel left the apple. There is a very good chance that if 'Julius is a rhino and Mary got the football' then John went to the bedroom. It is probably not the case that if either 'Emily is a mouse' or 'Julius is a rhino' but not both then Bernhard is a frog.
It is highly unlikely that 'Bernhard is a frog and Mary got the football'.
It is highly unlikely that 'Bernhard is a frog and Mary got the football'.
It is likely that 'Bernhard is a frog and Mary 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
  0.2::factA.
  0.2::factB.
  0.7::factC.
  %hop1
  0.7::factX:-and(factC,factA).
  0.8::factY:-and(factB,factC).
  0.25::factZ:-xor(factA,factB).

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

  query(conclusion).
  
'Bernhard is a frog and Mary got the football'.