Existence

I think the idea of existence is kinda taken for granted. In fact, it is so fundamental that it seems difficult to explain what it is.

Why do we think that atoms exist? Or electrons? Or photons? It is because the idea of their existence can help to simplify a lot of things. Similarly, it seems that everything else also "exists" to account for our sense data. Existence is created by a thinker and observer. It is not something inherent in an object. Or rather, existence is part of our template of ideas.

So it would not be accurate to speak of something existing at any point in time when you are not directly observing it. It would make sense if it does, it would make sense if it doesn't, but whether something exists or not makes sense doesn't affect whether it really exists or not.