---
type: "term"
title: "Unknown Δt"
description: "A Δt value where no supported time statement can be made."
resource: "tlctc:term:unknown-t"
tags:
  - "glossary"
---
# Unknown Δt

A Δt value where no supported time statement can be made. Notation: `Δt=?`.

**Reference:** §12.0.3, §12.2.3