premise: Grading and pricing fish in an open air fish market.
hypothesis: A fresh catch right off the boat has been delivered for sale to the market.
explanation_1: Not all fish sold at market are fresh. Not all fish are caught by boats.
explanation_2: Does not specify that it is fresh off the boat in the first sentence. Also, it does not specify that it is the fish market.
explanation_3: Fish are not necessarily fresh catch right off the boat.
premise_logic: exists s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_market(x4) & of(x4,x6) & n_fish(x6) & of(x4,x5) & n_air(x5) & a_open(s2) & Theme(s2,x4) & n_fish(x2) & of(x2,x3) & n_pricing(x3) & subset_of(x1,s1) & n_grading(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4 x5.(n_market(x5) & n_boat(x3) & for(e1,x4) & to(x4,x5) & n_sale(x4) & Theme(e1,x1) & v_deliver(e1) & off(x2,x3) & right(x1,x2) & n_thing(x2) & n_catch(x1) & a_fresh(s1) & Theme(s1,x1))