Can you solve the MAGNET RIDDLE? ft YouTube CEO Susan Wojcicki

If you put the two bars on a flat surface near you but have them face perpendicular to each other and put them a distance away from each other (like the distance of the magnetic field) then the one that is magnetic shouldn't move very much when you push the two together slowly. The non-magnetic one will leap towards the other bar when the magnetic field is breached.  This way you can tell the magnetic one from the non-magnetic one. This is because the magnetic pull is only caused by one bar.