It is certain that Lily is green. It is likely that Brian is a frog. It is probably not the case that Sandra took the football. It is certain that if either 'Brian is a frog' or 'Sandra took the football' but not both then Jason is tired. It is almost certain that if 'Sandra took the football' or 'Brian is a frog' or both then Greg is white. Chances are about even that if 'Brian is a frog and Sandra took the football' then John went to the hallway.
There is little chance that 'Jason is tired and Lily is green'.
There is a better than even chance that 'Jason is tired and Lily is green'.
There is little chance that 'Jason is tired 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
  1.0::factA.
  0.7::factB.
  0.25::factC.
  %hop1
  1.0::factX:-xor(factB,factC).
  0.95::factY:-or(factC,factB).
  0.5::factZ:-and(factB,factC).

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

  query(conclusion).
  
'Jason is tired and Lily is green'.