Cat in a Box

Considering future and past light cones, absolute past and future, and an event horizon there is another problem, as accommodated thus by relativity theory. There could “exist” other life in outer space whom we cannot contact ever i.e. it would be inherently impossible to communicate or influence in any way ever for both ways nor any exchange of information. They are completely isolated. In a way as parallel but the same realities? I think it is possible.

Do, did or will such beings ever exist? Can they? Otherwise also, cannot? You'll never know! Never the twain shall meet, by definition.

The situation is similar to Schrödinger’s Cat but now the box is sealed and cannot be opened ever. So apart from dead or alive you don't even know if there's a cat inside or not and you will never know.

What is more in this case now there is no problem with logic.

As pure reasoning “this statement is unprovable” is such an idea. Also in advanced mathematics are problems as treated in Gödel’s “on formally undecidable propositions”.

Therefore there might well be otherworldly intelligent life forms, or not, for which in principle it would be impossible to decide.