outside world, n.All

Outside world (n.) has ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠no color, shape, weight or heat without "inside" brains — and the brains are members of that world.