Chances are about even that John moved to the garden. We doubt that Sumit is hungry. It is probably the case that Greg is a frog. It is impossible that if either 'Greg is a frog' or 'Sumit is hungry' but not both then Mary got the football. It is highly unlikely that if either 'Sumit is hungry' or 'John moved to the garden' but not both then Brian is gray. It is probably not the case that if 'Sumit is hungry' or 'Greg is a frog' or both then Yann is thirsty.
It is probable that 'Sumit is hungry and John moved to the garden'.
Chances are slight that 'Sumit is hungry and John moved to the garden'.
It is probable that 'Sumit is hungry and John moved to the garden'.

  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
  0.5::factA.
  0.2::factB.
  0.7::factC.
  %hop1
  0.0::factX:-xor(factC,factB).
  0.05::factY:-xor(factB,factA).
  0.25::factZ:-or(factB,factC).

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

  query(conclusion).
  
'Sumit is hungry and John moved to the garden'.