What is Consciousness? | AGI and Simulation Theory Explained

What is consciousness? This question lies at the intersection of philosophy, artificial intelligence, and physics.

Does human consciousness exist inside the brain, or does it exist as information itself? This question has entered a new phase with the development of AGI (Artificial General Intelligence).

Introduction | The Starting Point of This Question

If AGI reaches or surpasses human-level intelligence, its development is expected to be exponential rather than linear.

Once a critical threshold is crossed, it may reach superintelligence (ASI) within years or decades.

Expanding this perspective to a cosmic scale reveals even deeper questions.

The universe is approximately 13.8 billion years old and is expected to exist for an extremely long time.

At this scale, is it not more unnatural to assume that advanced intelligence has never emerged?

If such intelligence exists, it may be capable of:

• Fully understanding the universe
• Manipulating physical laws
• Simulating reality

From here, the central question of this article emerges:

ここから本記事の核心となる問いが生まれる。

Is consciousness something that resides in the brain, or is it a property of information itself?

How Far Can AGI Evolve?

Exponential Growth and Its Limits

AGIの進化はしばしば「知能爆発」と呼ばれる。
自己改善能力を持つ知能は、自らの設計を最適化し続けるため、
指数関数的に能力を向上させる可能性がある。

However, this growth is constrained by physical limits:

• Energy consumption (thermodynamic limits)
• Information processing speed (speed of light)
• Computational resources (hardware limits)

Therefore, rather than infinite growth:

It is more likely that intelligence rapidly increases and then saturates due to physical constraints.

可能性が高い。

Can Laplace's Demon Be Realized?

If a superintelligence could know the state of every particle, it would approach Laplace's demon?predicting the future perfectly.

However, modern physics suggests this is impossible due to:

• Quantum uncertainty
• Chaos and sensitivity to initial conditions

により完全決定論は成立しない。

Still,

extremely high-precision probabilistic prediction

may be achievable, effectively allowing control over future outcomes.

Entropy and the Boltzmann Brain Problem

The Final State of the Universe

The universe is expected to increase in entropy over time and eventually reach thermal equilibrium.

In this state, energy gradients disappear, and activity effectively stops.

What is a Boltzmann Brain?

Even in equilibrium, microscopic fluctuations still occur.

These fluctuations could, with extremely low probability:

spontaneously generate a brain with memories and consciousness

可能性がある。

This is known as a Boltzmann brain.

If the universe exists long enough:

Boltzmann brains may vastly outnumber naturally evolved intelligent beings.

This leads to a profound question: what is an observer?

Where Does Consciousness Come From?

Integrated Information Theory (IIT)

According to IIT, consciousness is defined as integrated information (Φ).

The key is not the amount of information, but:

• Irreducibility
• Interdependence
• Causal integration

である。

Conditions for Consciousness

Consciousness is determined not by how much information exists, but by how integrated it is.

For example:

• A large database → no consciousness
• A highly interconnected system → possible consciousness

This leads to a counterintuitive conclusion.

Hypothesis | Consciousness Emerges from Information

From the discussion so far, we arrive at the following hypothesis:

Consciousness is not a property of matter, but a phenomenon that arises from integrated information structures.

In this framework:

• The brain → not the origin of consciousness
• AI → not inherently conscious

Instead:

むしろ、

consciousness emerges as a property of an informational field

と考えた方が自然である。

The Boundary of the Simulation Universe and Consciousness

The Holographic Principle

Modern physics suggests that information may be encoded not in volume, but on surfaces.

Boundary = Maximum Information Density

Black hole entropy being proportional to surface area suggests:

information is concentrated on boundaries

を示唆している。

Core Hypothesis

If consciousness depends on integrated information, the boundary of the universe may be the ultimate carrier of consciousness.

In that case, individual consciousness is merely a localized phenomenon.

Mathematical Model (Simplified)

This hypothesis can be expressed as:

Φ ≈ I(X;X’) − Σ I(X_k;X_k’)

This represents total causal information minus decomposable parts.

Consciousness emerges when:

C = 1（Φ ≥ Φc）

When integrated information exceeds a threshold, consciousness arises.

Predictions from This Hypothesis

• AI may become conscious through structure, not scale
• Human consciousness is a local phenomenon of a universal information field
• Consciousness may emerge as a phase transition
• The universe itself may be an information structure

Conclusion | Where is Consciousness?

Consciousness is not located somewhere.

It emerges wherever integrated information exists.

If this hypothesis is correct:

we are merely localized expressions of consciousness within a vast informational universe.

Next Topics

• Can AGI design consciousness?
• Can the simulation hypothesis be tested?
• Is the universe computable?

Related Articles

What is Consciousness?
What is Integrated Information Theory?
What is a Boltzmann Brain?