It is probably the case that Julius is a rhino. It is highly likely that Winona is a mouse. It is probably not the case that Mary discarded the milk. It is probable that if 'Julius is a rhino and Mary discarded the milk' then John went to the garden. It is almost certain that if 'Winona is a mouse and Julius is a rhino' then Daniel took the apple. It is unlikely that if either 'Julius is a rhino' or 'Mary discarded the milk' but not both then Greg is a swan.
It is unlikely that 'Mary discarded the milk and Julius is a rhino'.
It is unlikely that 'Mary discarded the milk and Julius is a rhino'.
It is highly likely that 'Mary discarded the milk and Julius is a rhino'.

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

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

  query(conclusion).
  
'Mary discarded the milk and Julius is a rhino'.