There is almost no chance that Lily is green. It is likely that Jeff left the apple. Chances are about even that Greg is a lion. It is probably not the case that if 'Jeff left the apple and Greg is a lion' then Yann is bored. It is almost certain that if 'Greg is a lion and Jeff left the apple' then Brian is a rhino. There is a better than even chance that if 'Greg is a lion' or 'Jeff left the apple' or both then Sandra grabbed the milk.
It is probably not the case that 'Jeff left the apple and Greg is a lion'.
It is probably not the case that 'Jeff left the apple and Greg is a lion'.
It is probably the case that 'Jeff left the apple and Greg is a lion'.

  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
  0.02::factA.
  0.7::factB.
  0.5::factC.
  %hop1
  0.25::factX:-and(factB,factC).
  0.95::factY:-and(factC,factB).
  0.6::factZ:-or(factC,factB).

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

  query(conclusion).
  
'Jeff left the apple and Greg is a lion'.