Non-Monotonic Logic
Definition
Nonmonotonic logic can retract conclusions when new information is introduced.
Logical systems in which new information can retract previous conclusions.
Simply explained
An initially plausible inference is changed as soon as important additional information becomes known.
Why it matters in practice
Helps realistically assess model quality, limits, and technical decisions.
Example from business
From "Birds normally fly" the conclusion is drawn until the additional information "Penguin" revises the inference.
Limits and pitfalls
- Do not confuse with inconsistent logic or fail to explicitly model priorities and exceptions.
Origin & history
Nonmonotonic logic was developed from the 1970s for everyday reasoning with exceptions.
Use in mid-sized companies
- Possible application: From "Birds normally fly" the conclusion is drawn until the additional information "Penguin" revises the inference.
Frequently asked questions
What does Nonmonotonic Logic mean?
Logical systems in which new information can retract previous conclusions.
Which mistakes should be avoided?
Do not confuse with inconsistent logic or fail to explicitly model priorities and exceptions.
Sources
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: