Saying something like that demands what you categorize/define as existing.
English
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Existence is an extension of perception. You cannot define non-existence, or define something that is non-existent, because it is existent in your perception. Thus, you cannot define existence, if you are to define it as the opposite of non-existence. To put it in a different way, you cannot possibly prove that 1=1 mathematically, because it is an axiom which is assumed to be true.
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So, my single read through your reply left me with. So without perception there is no existence?
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Not that the statement really means much because it is self-containing, but yes.