ex post facto

USAGE SUMMARY

'ex post facto' is a correct and usable phrase in written English.
It is used to refer to a law or action which has retroactive effect. For example, "The government passed an ex post facto law, granting retroactive immunity to certain offenders."

✓ Grammatically correct

Law

Politics

Research

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

Ex post facto is Latin for "after the fact". An ex post facto law creates a punishment or for acts that occurred before the enactment of the law.

Los Angeles Times

Our Constitution forbids ex post facto laws.

The New York Times

pass any Bill of Attainder [or] ex post facto Law..

Cornell University

pass any Bill of Attainder, [or] ex post facto Law.

Cornell University

The study uses a descriptive, correlational, ex post facto design.

Computers & Education

That would be ex post facto with a vengeance.

The New York Times

The ex post facto clause bars retroactive punishment.

The New York Times

Human-verified similar examples from authoritative sources

Similar Expressions

4 human-written examples

This was designed as an ex post-facto prospective study.

BMC Psychiatry

The research design employed was ex-post facto survey design.

Procedia - Social and Behavioral Sciences

The study design was retrospective or ex-post facto.

Procedia - Social and Behavioral Sciences

The present investigation is a descriptive study, with a retrospective, ex-post facto, design.

Burns

Expert writing Tips

Best practice

When discussing legal matters, clearly specify which law or action is being considered "ex post facto" to avoid ambiguity.

Common error

Don't assume that every law affecting past actions is "ex post facto". This term specifically applies to laws that criminalize actions that were legal when committed or increase penalties retroactively. Not all retroactive laws are "ex post facto".

Linguistic Context

The phrase "ex post facto" functions as an adjective, modifying a noun (typically "law" or "rule") to indicate that it applies retroactively. Ludwig AI highlights its association with legal and governmental contexts. For example, "ex post facto law."

Expression frequency: Common

Frequent in

Academia

30%

News & Media

40%

Science

30%

Less common in

Formal & Business

0%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "ex post facto" is an adjective phrase primarily used in legal and academic contexts to describe laws or actions that apply retroactively. As Ludwig AI confirms, the phrase is grammatically correct and commonly used, particularly in discussions about law and policy. While its usage is relatively common, understanding its precise legal meaning is crucial to avoid misapplication. It's essential to remember that not all retroactive laws are "ex post facto", and the term specifically relates to criminal laws that disadvantage the accused.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

retroactive law

Refers specifically to a law that applies to actions that occurred before its enactment.

retrospective legislation

Highlights the legislative aspect of applying a law to past events.

after-the-fact

Emphasizes the temporal sequence of an action followed by a justification or explanation.

retroactively applied

Focuses on the act of applying something to a past situation.

with retroactive effect

Highlights the result of something being applied to the past.

post eventum

Latin term that indicates something that occurs or is done after an event.

retrospective application

Focuses on the application of a rule, principle, or law to past events.

backdated

Implies assigning an earlier date to something, often documents or agreements.

subsequently justified

Highlights the action of providing a justification at a later time.

validated post occurrence

Focuses on the validation or approval of something after it has already happened.

FAQs

How does the U.S. Constitution relate to "ex post facto" laws?

The U.S. Constitution prohibits both the federal government and the states from enacting "ex post facto" laws, as stated in Article 1, Sections 9 and 10. This protection ensures that individuals are not punished for actions that were not illegal at the time they were committed.

What constitutes an "ex post facto" law?

An "ex post facto" law is one that retroactively changes the legal consequences of actions committed before the enactment of the law. This includes criminalizing actions that were legal when committed, increasing the penalty for a crime after it was committed, or altering the rules of evidence to make conviction easier.

Are all retroactive laws considered "ex post facto"?

No, not all retroactive laws are "ex post facto". The prohibition applies specifically to criminal laws that disadvantage the accused. Civil laws can often be applied retroactively without violating the "ex post facto" clause.

What are some examples of laws that might be considered "ex post facto"?

Examples include a law that makes possessing a certain item a crime, but then punishes someone for possessing that item before the law was passed; or a law that increases the prison sentence for a crime that someone already committed. These would likely be deemed "ex post facto" and unconstitutional.