premise: Mom and little boy having fun & eating by the lake.
hypothesis: A mom and a son spending time together on their weekend supervised visit.
explanation_1: A boy is not assumed to be someone's son.  Having fun and eating does not imply that it is a weekend supervised visit.
explanation_2: Having fun and eating by the lake does not imply that they are on a weekend supervised visit.
explanation_3: The little boy was never implied to be her son. It wasn't stated that it was a weekend supervised visit.
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_lake(x6) & ne_nam_mom(x1) & a_topic(s1) & subset_of(x2,s1) & by(e1,x6) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & n_eating(x4) & ne_org_&(x4) & of(x4,x5) & n_fun(x5) & (x2 = x3) & n_boy(x2) & a_little(s2) & Theme(s2,x2) & subset_of(x1,s1))
hypothesis_logic: exists s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(on(s1,x7) & n_visit(x7) & a_supervised(s2) & Theme(s2,x7) & of(x7,x8) & n_weekend(x8) & of(x7,x1) & n_thing(x1) & Theme(s1,x2) & Pivot(s1,x1) & a_together(s1) & subset_of(x4,x2) & n_time(x4) & of(x4,x6) & n_spending(x6) & of(x4,x5) & n_son(x5) & subset_of(x3,x2) & n_mom(x3))