The statement that something does exist and the statement that it does not are exactly the same. Both require one of two things. Either evidence in support or belief. If there is no evidence, then it is belief. It can be nothing else.
Just because there are two options does not mean they are equally likely. And, again, not accepting a proposition as true is NOT the same as offering a counter proposition. If one makes a propostion with no evidence or support, one does not need any refuting evidence to not accept the proposition...it failed to support itself.
As to your final claim, that is simply false on its face. Reality does not require humans to define it to be real. Reality got along just fine before there were humans to be aware of it and just fine when humans thought lightning was thrown by Zeus. The only thing our inability to define something means is that we are unable to define it. It has absolutely no impact on whether or not it exists.
You misunderstood my point. If you cannot define what something is, then on what basis are you claiming it exists? I am not saying nothing exists unless a human defines it (and I have no idea how anyone could reasonably read my comments as saying that), I am saying that you cannot say that something exists unless you can define it. How is anyone supposed to know if your claim is true or false if they don't even know what it is they are supposed to accept or deny?
Any conclusion made in the absence of evidence is a belief. I've asked the others, now I shall ask you. Do you disagree with that and, if so, why?
I disagree with that. If I were to claim (in all sincerity as far as you could tell) that a fairy told me an alien was in your bedroom 2 days ago and left no trace of its passage, would you claim the proper response was neutrality because there was no evidence it did not happen and that it was just as likely an alien visited you as not?
I really hope you wouldn't