context: It is probably not the case that Lily is a lion. It is probable that Julius is a frog. Chances are slight that Jeff went to the garden. It is almost certain that if 'Julius is a frog' or 'Lily is a lion' or both then John put down the milk. It is probably not the case that if 'Jeff went to the garden' or 'Julius is a frog' or both then Greg is a lion. It is almost certain that if 'Julius is a frog and Jeff went to the garden' then Emily is a cat.
hypothesis: It is highly likely that 'Jeff went to the garden and Emily is a cat'.
valid_hypothesis: It is highly unlikely that 'Jeff went to the garden and Emily is a cat'.
invalid_hypothesis: It is highly likely that 'Jeff went to the garden and Emily is a cat'.
problog: 
    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.
    0.7::factB.
    0.1::factC.
    %hop1
    0.95::factX:-or(factB,factA).
    0.25::factY:-or(factC,factB).
    0.95::factZ:-and(factB,factC).
  
    %hop2
    conclusion:-and(factC,factZ).
  
    query(conclusion).
    
hypothesis_assertion: 'Jeff went to the garden and Emily is a cat'.