---
slug: "Probability"
name: "Probability"
type: "Data Structures"
layer: "Infrastructure"
ref: "Probability#d165"
sema_id: "sema:Probability#mh:SHA-256:d16533629fc1edf3af11e947ff110077d224eae3176315e57732652ea8072102"
tags: ["Infrastructure","Data Structures"]
updated: 2026-11-11
mindscape: "bootstrap"
index_url: https://mindscape.pages.dev/bootstrap/index.json
url: https://mindscape.pages.dev/bootstrap/Probability/
related: ["Event","Risk"]
---

# Probability

Likelihood measure for uncertain events

Layer: Infrastructure · Category: Data Structures

## Mechanism

A measure of likelihood on [0,1] expressing the degree of belief or frequency with which an [Event](https://mindscape.pages.dev/bootstrap/Event.md) is expected to occur. Forms the basis for risk assessment, decision-making under uncertainty, and Bayesian updating.

## Invariants

- Bounded: 0 ≤ P ≤ 1
- Normalization: P(certain) = 1, P(impossible) = 0
- Additivity: P(A or B) = P(A) + P(B) for mutually exclusive events

## Failure modes

—

## Data schema

```json
{
  "type": "number",
  "minimum": 0,
  "maximum": 1,
  "description": "Probability value between 0 and 1"
}
```

## Builds on

- [Event](https://mindscape.pages.dev/bootstrap/Event.md) (Infrastructure; References)

## Used by

- [Risk](https://mindscape.pages.dev/bootstrap/Risk.md) (Infrastructure; References)

## Identity

- Sema ID: `sema:Probability#mh:SHA-256:d16533629fc1edf3af11e947ff110077d224eae3176315e57732652ea8072102`
- Ref: `Probability#d165`
- Supersedes:
  - `sema:Probability#mh:SHA-256:850f439bbe870068f2129226975bb980e6714af43e55295a5b9dff7fed40f133`

## Links

- [Pattern page](https://mindscape.pages.dev/bootstrap/Probability/)
- [View in the interactive graph](https://mindscape.pages.dev/bootstrap/#Probability)
- [JSON](https://mindscape.pages.dev/bootstrap/Probability.json)
- [Index of all patterns](https://mindscape.pages.dev/bootstrap/index.json)