system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 the hard problem of consciousness

Can someone explain this to me in clear jargon-free language?
gpt
One way to see the problem is in the distinction between objectivity and subjectivity. If anything is subjective, it's consciousness. The sites, sounds, and feels that are the subject of your mental life are (on the usual picture of the mind) completely subjective and private. You might be wrong in thinking that there's a purple unicorn standing in front of you, but your conscious experience of that unicorn is as real as can be -- you are, according to one metaphor of consciousness, the sole viewer in the theater of your mind, and whatever is on that screen is *yours*. You experience it first-hand.

If anything is objective, it's science. Science doesn't vary from person to person, and it's supposed to be a third-person pursuit. The world is a certain way, and science tries to explain how that is, from a non-subjective perspective. 

So we have, seemingly, a problem. If we want to develop a science of consciousness, we're going to have to use objective means to study a subjective phenomenon. Those who think this is reflective of something insoluble have called this the "hard problem". They think that any science we apply towards studying the mind will necessarily fall short of describing consciousness, because we can't use objective facts to get at something that is totally subjective.