premise: A very joyous fireman or emergency medical worker.
hypothesis: A very happy very big human
explanation_1: Just because someone is a fireman or emergency medical worker doesn't mean that they are big.  No indication to size was provided in the description of the person,.
premise_logic: exists s1 s2.(a_topic(s1) & (n_fireman(s1) | exists s3 x1.(n_worker(s1) & a_medical(s3) & Theme(s3,s1) & of(s1,x1) & n_emergency(x1))) & a_joyous(s2) & Theme(s2,s1) & r_very(s1))
hypothesis_logic: exists s1 s2 x1.(a_topic(x1) & n_human(x1) & a_big(s2) & Theme(s2,x1) & r_very(x1) & r_very(x1) & a_happy(s1) & Theme(s1,x1))
premise_sim: exists s1 s2.(r_very(s1) & a_topic(s1) & a_joyous(s2) & Theme(s2,s1) & (n_fireman(s1) | exists s3 x1.(of(s1,x1) & n_worker(s1) & n_emergency(x1) & a_medical(s3) & Theme(s3,s1))))
hypothesis_sim: exists s1 s2 x1.(r_very(x1) & n_human(x1) & a_topic(x1) & a_happy(s1) & a_big(s2) & Theme(s2,x1) & Theme(s1,x1))