context: There is a better than even chance that Brian is a frog. It is probable that John put down the apple. It is probably the case that Mary got the football.
hypothesis: It is highly likely that 'John put down the apple' or 'Brian is a frog' or both.
valid_hypothesis: It is highly likely that 'John put down the apple' or 'Brian is a frog' or both.
invalid_hypothesis: It is unlikely that 'John put down the apple' or 'Brian is a frog' or both.
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
    0.6::factA.
    0.7::factB.
    0.7::factC.
    
  
    %hop2
    conclusion:-or(factB,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'John put down the apple' or 'Brian is a frog' or both.