I can't figure this out. Say 2 frames are in relative motion. When the origins at at the same place, 2 lasers shoot up the positive x axis and negative x axis. Let's call the 2 frames F and F'. F says the lasers will always hit simultaneous events along the x-axis. Then by the relativity of simultaneity F says the lasers for F' will never cause simultaneous events. But, F. says the lasers always cause simultaneous events along its x axis. So, how is this resolved that special relativity says F' will never see simultaneous events by F but F' says it always see simultaneous events?