# For Absence

> What is absent, and is it distinguished from unknown, omitted and zero?

Record: `reason:node-for-absence`
Kind: node
Canonical: https://banes-lab.com/ontology/reasoning#reason-node-for-absence

## axis

- [formalisation](https://banes-lab.com/records/reason/axis-formalisation.md)

## math-type

- [set-theory](https://banes-lab.com/records/reason/math-type-set-theory.md)

## referenced-by

- [Formalisation](https://banes-lab.com/records/reason/axis-formalisation.md)