premise: An old man looks at an unknown contraption from MakerBot Industries.
hypothesis: A man is trying to figure out how to work a 3-d printer.
explanation_1: An unknown contraption isn't necessarily a 3-d printer and looking at it does not mean trying to figure out how to work it.
explanation_2: It is not clear that MakerBot Industries makes 3-d printers.
explanation_3: The man is looking at an unknown contraption but it doesn't mean he is trying to figure out how to work it.  Also, the fact it is from MakerBot Industries does not imply that it is a 3-d printer.
premise_logic: exists e1 s1 s2 x1 x2 x3 x4.(ne_org_industries(x3) & (x3 = x4) & ne_org_makerbot(x4) & at(e1,x2) & from(x2,x3) & n_contraption(x2) & a_unknown(s2) & Theme(s2,x2) & Actor(e1,x1) & v_look(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 s1 x2.(a_out(s1) & Manner(e2,s1) & Topic(e2,x2) & Actor(e2,x1) & v_figure(e2) & n_manner(x2) & exists e3 s2 x3 x4.(Theme(e3,x4) & Actor(e3,x3) & v_work(e3) & n_printer(x4) & a_3-d(s2) & Theme(s2,x4))) & n_man(x1))