There is a very good chance that Lily is green. It is certain that Mary put down the apple. There is a better than even chance that Emily is a sheep. Chances are slight that if 'Emily is a sheep and Mary put down the apple' then John moved to the garden. It is highly likely that if either 'Lily is green' or 'Emily is a sheep' but not both then Brian is a frog. It is probably not the case that if 'Lily is green' or 'Emily is a sheep' or both then Jeff dropped the apple.
It is probably not the case that 'Brian is a frog and Lily is green'.
It is probably not the case that 'Brian is a frog and Lily is green'.
It is almost certain that 'Brian is a frog and Lily is green'.

  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
  0.8::factA.
  1.0::factB.
  0.6::factC.
  %hop1
  0.1::factX:-and(factC,factB).
  0.9::factY:-xor(factA,factC).
  0.25::factZ:-or(factA,factC).

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

  query(conclusion).
  
'Brian is a frog and Lily is green'.