Source: https://guthlabs.ai/docs/instruments/radiocarbon-c-14-age-with-calibration-note/implementation/

instrument implementation / implementation-contract

# Radiocarbon (C-14) Age with Calibration Note implementation

A source-bound implementation contract for Radiocarbon (C-14) Age with Calibration Note; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t5-027

**Effect**: Computation or source lookup only

## Input and validation requirements

The raw formula has an undefined input at f=0 and produces a mathematically finite but physically invalid negative age for f>1. A robust instrument must reject those inputs. The pMC-versus-ratio convention is also hazardous unless the representation is explicitly declared.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "input_mode": "pMC",
    "value": 100
  },
  "expected_outputs": {
    "fraction_modern": 1,
    "conventional_age_BP_years": 0
  },
  "working": "Convert pMC to fraction: f = 100/100 = 1. Compute 1/f = 1/1 = 1. ln(1) = 0. Therefore t = 8033 × 0 = 0 years BP."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/radiocarbon-c-14-age-with-calibration-note/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/radiocarbon-c-14-age-with-calibration-note/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/radiocarbon-c-14-age-with-calibration-note/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`