"Unless there are externally observable things that can't or are unlikely to be done without consciousness..." If it weren't, why would it have evolved in the

"Unless there are externally observable things that can't or are unlikely to be done without consciousness..." If it weren't, why would it have evolved in the first place? It seems me not unlikely that the only way we can accurately surmise what's going on inside the heads of other people (an obvious survival advantage) is to have that subjective experience of what's going on inside our own.