"whatever can be thought of is an idea in the mind of the person thinking of it ; therefore nothing can be though of except ideas in minds ; therefore anything else is inconceivable, and what is inconceivable cannot exist."
that is a quote from Bertrand Russell, paraphrasing the likes of Berkeley and Leibniz, the creators of the theory of sense-data. this is from the first chapter of the book I bought. at the moment, I've learnt that, according to the sense-data subscribers, everything we see is just an image in our minds, made real by our perception, but the thing continues to exist if we no longer look at it, because of god (Berkeley), the universe (Leibniz), or a vast collection of electronic charges in violent motion (sober science). xx
