There's a widely held belief that "reality" is a consensus belief system. That if no one believes (or perhaps thinks) of something, it doesn't exist. Right now, I'm trying real hard to not imagine the IRS.
I of course presented the original question as: "Which came
first the scriptor or the script?" Because I think there are
two sides of the coin. I agree with your summed up view, that
things must be believed before they exist. But similarly the
notion that things exist even before they are believed is equally
appealing.
On the trek for knowledge I think it's important for the
adept to see both sides of the coin.