What the mind adds to sensibilia, in fact, is merely awareness: everything else is physical or physiological.

A few preliminary remarks, to be amplified as we proceed, will serve to elucidate the use which I propose to make of sensibilia.

But we may legitimately inquire as to the existence or reality of "things" or other "sensibilia" inferred from such objects.

Such correlated "sensibilia" will be called "appearances of one thing."