Existence only exists in individual truth; yes I know it is initially a confusing statement to understand. This is a 'reality exists in the mind' concept. I believe that our inner reality or individual truth is existence, yet it may be possible that in an external reality we do not exist (i'll explain further below).
We have the conciousness to be able to know or think of our existence. Some people see existence as physical reality. Some would see it beyond the 'real world' and into a form of spiritual realm. Is reality an existence? Is the way we perceive things via our 'inner' realm a reality? (reality exists in the mind concept). Is our reality and or existence socially constructed?
My individual truth of the 'real' world is a postmodernist realm, that there is no one universal truth . I don't like to seek ultimate 'truth', but only reasons; only individual truth. What you define truth as, isn't universal. Space, me, and life exists because it is part of my 'inner' individual reality or truth...i'll explain this right below
This is how I perceive individual reality, truth and existence:
The only way we can reason reality, truth or existence is through our own mind. The world "out there", external reality, is a shared universe of common experience. It is the lowest common denominator of all our experience. We take it for granted and it supplies us with a common field of action. That is all it is. Your realm of personal "mind" is another sort of universe. You experience it every second 24/7. From your inner mind comes all meaning about everything in the "outer" universe. You may be influenced by the external world of common experience, but this inner individual universe exists, is very real, and is ultimately of more value than anything "out there". Why? Because what happens "out there" depends totally on what you do or what occurs with your own mind. Your personal universe is the only thing able of deciding value. What you perceive from the 'outer' universe is received and detected in your 'inner' reality. When one's inner reality is destroyed through belief systems, one can only after time become a shadow of raw matter and energy - which in itself is meaningless and dead. In the end, what you end up believing "in" or "about" is basically an action of your own mind to attach meaning and significance to something.
Not if your existance is not individual. If you exist in a way that shares your thoughts and emotions and experiences with someone else, they, in essence, exist with you
Some people would agree with you, but others would say that once one shares anything with someone else; it is no longer individual but rather a shared experience.