Why Does It Feel Like Anything to Be You? A Field Guide to Theories of Consciousness

Your brain can sort colours, sounds and memories, and in principle you could explain all that sorting without anyone needing to be home. Yet tasting your morning coffee feels like something from the inside. Science has several serious rival accounts of why. They disagree about almost everything, except that the question is worth asking.

Look at a red apple.

A lot happens very quickly. Light bounces off the skin and hits your eyes. Signals race back through your brain, which picks out the edges, the shape, the colour. Somewhere along the way, your brain sorts it into the category "apple", checks it against memory, and makes it available for you to say out loud: "Ooh, an apple."

All of that is, in principle, the kind of thing science knows how to explain. It's machinery. Signals in, signals processed, behaviour out.

But there's something else going on too. There's the redness. The way it looks to you. And that's where things get strange. Because you could, in principle, describe every step of the machinery and still not have said a word about why any of it feels like something.

That puzzle is the subject of this field guide. Not to settle it, because nobody has. But to give you a map of the main schools of thought, what each of them thinks an experience actually is, and where they disagree.

Something it is like

Philosophers have a handy way of pinning down what they mean by consciousness. A creature is conscious if there is "something that it is like" to be that creature. The phrase comes from a famous 1974 essay, and it's stuck because it captures exactly the right thing.

There's something it is like to be you, reading this. There's presumably nothing it is like to be the paper or screen these words are on. The question is what makes the difference.

The easy problems and the hard one

In 1995 a philosopher gave this puzzle its best-known name. He split the questions about consciousness into two piles.

The first pile he called the easy problems. These are the problems of explaining the function, dynamics and structure of consciousness. How do we tell one colour from another? How do we sort things into categories? How does information in the brain get accessed and reported in words? How do we learn, reason and remember?

Calling these "easy" is a bit of a joke. They're fiendishly hard. But they're easy in one specific sense: we know what an answer would look like. You'd explain the mechanism, the way you'd explain how a car engine works, and you'd be done.

The second pile has just one item in it. The hard problem: why is any physical state conscious, rather than nonconscious? Why isn't all that processing going on "in the dark", with nobody home to experience it?

An older term for this captures the frustration nicely. In 1983 another philosopher described an "explanatory gap" between the physical world and conscious experience. The idea is that a good explanation should leave you in no doubt. Explain why water boils at a certain temperature and, once you've understood it, there's nothing left to ask. But explain everything physical about the brain, and there still seems to be an open question: and why does it feel like this?

Some people think that gap is temporary, a sign of how far the science still has to go. Others think it might be permanent, at least for human minds. Keep that disagreement in mind. It's going to come back.

Now for the main rival theories. There are many more than these, but these four families will get you a long way.

Theory one: the stage

The first theory is the most theatrical, quite literally. It's called Global Workspace Theory, and it was introduced in 1988.

It starts from the idea that the brain contains many specialised processes running side by side, and that much of this work goes on without you being aware of it at all.

Global Workspace Theory uses the image of a theatre. Imagine the brain as a stage with a spotlight on it. Behind the scenes and out in the audience are all those specialist processes, busily doing their own thing. Only what's lit up by the spotlight on the stage is fully conscious. And the key point is what happens to that lit-up material: it gets broadcast to the whole audience. Every specialist process can now get hold of it and use it.

So, on this view, being conscious of the red apple means that information about it has won a competition for a limited space and been broadcast widely across the brain. That's what makes it available for you to report, and to use flexibly in deciding what to do.

A newsroom might be a modern version of the same picture. Lots of reporters chasing their own stories, a limited number of slots on the front page, and once a story makes the front page, everyone reads it.

Later versions of the theory went further and tied it to particular brain systems. They suggested that conscious perception starts only when a larger network across the brain "ignites".

Its critics have a pointed response, though. At best, they say, this is an account of what consciousness does: the job it performs in the brain. It doesn't address the deeper question of what consciousness is. In other words, it might be a superb answer to the easy problems, while walking straight past the hard one.

Theory two: the integrated whole

The second theory takes a very different approach. It's called Integrated Information Theory, and it was proposed in 2004.

Instead of asking what consciousness does, it asks what kind of structure a conscious system has. Its core claim is that consciousness corresponds to integrated information. Roughly speaking, the theory measures how much a system's parts work together as a whole, in a way that can't be broken down into separate, independent pieces. The more of that a system has, the more conscious it is.

That has some surprising consequences.

First, consciousness becomes a matter of degree. It isn't simply on or off. It can exist in many degrees, a bit like brightness rather than a light switch.

Second, it isn't tied to brains. Anything with the right kind of structure would count. The theory's own proponents accept that even a simple light-sensing component, a photodiode, has some tiny degree of consciousness under this view. Critics have argued that the theory amounts to panpsychism, the old idea that consciousness is spread throughout nature.

And then it gets stranger still. One critic showed that an inactive arrangement of simple logic gates, the basic switches inside computers, could in principle score as unboundedly more conscious than humans are, if they were arranged in the right way. The theory's founder accepted this, and argued it was a strength rather than a weakness.

You can probably guess that this theory is controversial. In 2023 an open letter signed by 124 scholars argued that until it is empirically testable, it should be labelled pseudoscience. It's worth knowing, though, that a later survey of researchers found only 8 per cent fully agreed with the letter. There's also a practical problem: actually calculating the theory's measure for a large system like a brain is intractable, so researchers can only work with approximations, and different approximations can give very different answers.

Theory three: thinking about thinking

The third family of theories is perhaps the easiest to picture. These are called higher-order theories.

The idea is this. Not every mental state is conscious. You can be in a state, like registering the hum of a fridge, without ever noticing it. What makes a state conscious, on these theories, is that your brain represents you as being in it. A conscious mental state is one whose owner is, in some way, aware of being in it.

So there are two levels. The first-order state, say, seeing red. And the higher-order state, which is about the first one: something like "I am seeing red". When the second kind is aimed at the first, the first becomes conscious.

There are two main flavours. One says the higher-order awareness works like a kind of inner perception, an inner sense that scans your experiences. The other says it's more like a thought, a judgement that you're in a particular state.

It sounds tidy, but it raises awkward questions. What happens if the higher-order state misfires? Could you have a higher-order state about an experience you aren't actually having, and so seem to be conscious of something that isn't there? Or could the higher-order state misdescribe the first one, representing an experience as orange when it's really red? There are also questions about whether animals and infants could have the kind of higher-order states the theory needs, and, once again, whether any of this explains the feel of an experience at all.

The counterintuitive turn: what if the glow is a story?

So far, every theory has taken the inner glow of experience as a given, and tried to explain it. The last family does something bolder. It questions the glow itself.

The broad view is called illusionism. Its claim is not that consciousness isn't real. It's that the special inner qualities we think our experiences have, what philosophers call phenomenal properties, are a kind of illusion produced by introspection. When the brain looks inward, it systematically misrepresents its own states. It gives itself a distorted picture of what's actually going on.

On this view, the real features underneath are ordinary working features of the brain. And the hard problem changes shape. The question is no longer "how does the brain produce this mysterious inner glow?" It becomes "why do our experiences seem to have that glow at all?" Illusionists call this the illusion problem.

A related idea is the attention schema theory. It starts from something the brain definitely does. Your brain builds a simplified model of your body, a rough internal sketch of where your limbs are and what they're doing, so it can control your movements. The attention schema theory suggests the brain does something similar for its own attention. It builds a simplified model of what it's paying attention to and how, so it can monitor and control that attention. And that model, the theory says, is what subjective awareness is.

Think of it as a map that labels itself. The brain's description of its own attention says, in effect, "there is an inner awareness here, grasping this apple". That description is what we report when we talk about experience.

This theory is consistent with illusionism, though the word "illusion" may be misleading here. The attention schema is normally a well-functioning internal model, not an error. And calling consciousness an illusion can wrongly suggest there's nothing real behind it. It's more like a simplified sketch than a hallucination.

At the far end of this territory sits a stronger position, sometimes called eliminativism, which holds that there is no hard problem of consciousness at all.

So who's winning?

Nobody, yet. And that's the honest answer.

The theories make different predictions, which is good news, because it means they can be tested against each other. Head-to-head experiments have started. In one large project, researchers set out in advance what Integrated Information Theory and a version of Global Workspace Theory each predicted about brain activity, then ran the experiments. In the initial results, two of Integrated Information Theory's three predictions passed the agreed threshold, and none of the workspace theory's did.

But one round of experiments doesn't crown a winner. The open letter calling Integrated Information Theory pseudoscience came out in the same year. Critics continue to argue that its core ideas lack empirical support. And the workspace theory's critics still say it explains what consciousness does, not what it is.

Meanwhile, the deeper split remains. Some theorists think consciousness is a function, and can be fully explained in terms of what it does. Others think experience is something simple, which can be identified with certain physical states. Some think the problem is unsolved for now. Others think it may be unsolvable by minds like ours. And some, as we've seen, think the problem is a kind of trick the brain is playing on itself.

This piece doesn't pick between them. That's not fence-sitting. It's an accurate picture of where things stand.

Why the map matters

So why bother learning the map, if nobody knows which territory is real?

Because each theory gives a different answer to the most basic question of all: what kind of thing is an experience?

Is it information being broadcast across a stage? Is it a particular kind of integrated structure, which could exist in a photodiode as well as a person? Is it the brain representing its own states to itself? Or is it a simplified model, a self-description, that we've mistaken for something more mysterious?

And those answers matter more than they might seem. You'll see headlines asking whether some animal is conscious, or whether a machine could be. Those questions don't have one answer. They have one answer per theory. A workspace theorist will ask whether information is being broadcast widely enough. An integrated information theorist will ask about the system's structure, whatever it's made of. A higher-order theorist will ask whether the system represents its own states. An illusionist will ask whether it builds the right kind of model of itself.

So the next time you see one of those headlines, you'll know the first question to ask: conscious, according to which theory?

And the next time you look at a red apple, you'll know that the simple fact of it looking like something is still one of the deepest open questions there is.

SOURCES

1. Stanford Encyclopedia of Philosophy, "Consciousness." https://plato.stanford.edu/entries/consciousness/ (accessed 25 Oct 2026)

2. Internet Encyclopedia of Philosophy, "Hard Problem of Consciousness." https://iep.utm.edu/hard-problem-of-conciousness/ (accessed 25 Oct 2026)

3. Stanford Encyclopedia of Philosophy, "Higher-Order Theories of Consciousness." https://plato.stanford.edu/entries/consciousness-higher/ (accessed 25 Oct 2026)

4. Wikipedia, "Global workspace theory." https://en.wikipedia.org/wiki/Global_workspace_theory (accessed 25 Oct 2026)

5. Wikipedia, "Integrated information theory." https://en.wikipedia.org/wiki/Integrated_information_theory (accessed 25 Oct 2026)

6. Wikipedia, "Attention schema theory." https://en.wikipedia.org/wiki/Attention_schema_theory (accessed 25 Oct 2026)

7. Closer To Truth, Landscape of Consciousness, "Frankish's Illusionism." https://loc.closertotruth.com/theory/frankish-s-illusionism (accessed 25 Oct 2026)