> ut wouldn't make that the cat the observer then? Or perhaps even the mechanism on the poison vial?

yes, but the for the scientists... it a superposition "A/D"

What is existence..
If existence is to be, then there are many 'senses' i wich an object can fail to exist.. put an pencil infront of a TOTALY blind man.. he does not see it, therefor it doesn't exist to him. only until he touches it, feels it or smells it "lets his senses interact with it" or until he is told about it.

As im writing this I have an apple beside me.. this apple is green and ripe... this apple i speak of is now existant to you, beacuse i mentioned it.. and even if i tell you that i lied, and i actually dont have an apple.. it still exists. how can it not exist? can you trust me? can your trust your own judgement?

Suppose one listed out all the properties and relations of an apple sitting on a table. It is red, it has a stem, it is four inches wide, it is juicy, it is on the table, it is in a room, and so on. Then, once one has listed out all the properties and relations of the apple, one could try claiming that the apple exists (or "is,"). But that does not add any new property to the thing. Therefore, existence is not another property over and above all these. So what is existence.. what does it mean for an object to exist. George Orwell defined existence in his popular novel Nineteen Eighty-Four. O'Brien explains to Winston that if both of them believed that O'brien had floated away like a soap bubble then he had.