---
title: "Proof"
description: "one arm of the four run on a draft: what was planted and what the check read"
section: concepts
address: /concepts/proof
contract: 0476e35e6e275db5
---

# Proof

one arm of the four run on a draft: what was planted and what the check read

[figure: Proof is a work at follows scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | work |
| scope | follows |
| key | the draft and the arm |
| store | postgres |
| family | studio |



## Fields


| field | type | required | note |
|---|---|---|---|
| `draft` | `id` | yes |  |
| `arm` | `one of the planted fault \| the known member \| the empty population \| the member placed where the enumerator does not look` | yes |  |
| `planted` | `text` | yes |  |
| `read` | `text` | no |  |



## Routes that use it
No route takes or returns Proof directly. The record holds it, and the objects that point at it reach it.