I am having trouble understanding, from a conceptual point of view, why it would be impossible to travel faster than the speed of light.
I have read one explanation given in the form of an example to explain why causality would make it impossible to travel faster than light. The example was if say for instance a bullet were to travel faster than light, then the bullet would hit the target before the trigger was pulled.
At first I thought this kind of made sense, but then the more I thought about it I do not think it does. My problem with this example is I do not see why that proves anything. In my mind it is entirely conceivable that the bullet could hit the target before the observer sees the trigger being pulled, that does not violate causality if the bullet is travelling faster than light, much the same way one sees an axe fall on a tree before the sound reaches their ears, so they see it fall before the sound is perceived. It doesn't violate causality. I guess I do not see what is different when talking about light.
What it seems like to me is that we are making the assumption that unless and until we "see" it happen, it has not yet happened. I do not understand why this is the case. Doesn't the fact that we have not "seen" the event occur yet simply mean that those photons have not yet reached our view, not that the event hasn't yet occurred, we just haven't seen it yet? Does this question make sense?