If something lies outside our realm of perception, then how can we know it?

Choose one of the following and explain how you know it even though it lies outside your immediate realm of perception.

We’re all going to die someday.

How do I know this? Well, even though it lies outside my immediate realm of perception I think things like this are implied as soon as you are old enough to realize what life is. Though I don’t know much about death, I have come to this conclusion based on previous experiences such as the deaths of family members, friends and relatives. The fact that we’re all going to die someday does not seem as scary as it sounds. Maybe this is due to the fact that everyones knows and talks about it as if it is nothing. Things like this are not really taught to you but more like you learn to infer base on what you hear and see. I know that we are all going to die someday because I have seen people born and die. Aside from that, I do not think there has ever been any documentary of anyone who has lived forever.