The first postulate is perfect, the laws of physics are the same for all uniform inertial frames of reference. In fact the second postulate is perfect as well the speed of light is constant in all uniform inertial frames of reference. But here is my problem with it, the speed of any wave is constant in all inertial frames of reference. By adding speed all you're doing is giving the wave energy in the direction of motion and taking energy from it the opposite direction. So why would mass not be able to exceed the speed of light? Especially when the laws of physics are the same in all inertial reference frames. This means all motion is relative.When you surpass the speed of sound you get a sonic boom because the said object is moving to fast for the wave to keep up. But for the speed of sound we don't measure v-s or v+s, where s = speed of sound, like we would in classical mechanics but we don't calculate time dilation from it. I see a problem here. Mass cannot force light to accelerate but this doesn't necessarily mean mass cannot surpass a photon. If the laws of physics are the same in all reference frames once we we reach escape velocity why wouldn't we be able to reach speeds beyond the speed of light?