It is probably not the case that Jessica is a cat. There is a very good chance that Emily is a mouse. It is probably not the case that John discarded the milk. It is probably the case that if 'John discarded the milk' or 'Jessica is a cat' or both then Daniel left the apple. It is likely that if either 'John discarded the milk' or 'Emily is a mouse' but not both then Bernhard is green. It is highly unlikely that if 'John discarded the milk and Emily is a mouse' then Lily is a swan.
There is a very good chance that 'John discarded the milk and Jessica is a cat'.
It is highly unlikely that 'John discarded the milk and Jessica is a cat'.
There is a very good chance that 'John discarded the milk and Jessica is a cat'.

  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
  0.25::factA.
  0.8::factB.
  0.25::factC.
  %hop1
  0.7::factX:-or(factC,factA).
  0.7::factY:-xor(factC,factB).
  0.05::factZ:-and(factC,factB).

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

  query(conclusion).
  
'John discarded the milk and Jessica is a cat'.