premise: Group yoga class exercising.
hypothesis: Half of the yoga group are female.
explanation_1: A yoga group is not assumed to be half female.
explanation_2: Just because there is a group yoga class doesn't mean half the class is female.
explanation_3: Just because there is a group of people doing yoga does not mean that half the group are females.
premise_logic: exists e1 x1 x2 x3.(Actor(e1,x1) & v_exercise(e1) & n_class(x1) & (x1 = x3) & ne_nam_yoga(x3) & (x1 = x2) & ne_org_group(x2))
hypothesis_logic: exists s1 x1 x2 x3.(n_group(x2) & of(x2,x3) & n_yoga(x3) & Theme(s1,x1) & a_female(s1) & of(x1,x2) & n_half(x1))