post facto

USAGE SUMMARY

"post facto" is a correct term and is commonly used in written English.
It means "after the fact" or "after the event". It is usually used to describe something that happened or was done after a particular event or action has already taken place. Example: The law was created post facto, meaning that it was enacted after the crime was committed. In this example, "post facto" is used to describe the timing of the law's creation, as it was made after the crime had already been committed.

✓ Grammatically correct

News & Media

Science

Encyclopedias

Wiki

Human-verified examples from authoritative sources

Exact Expressions

45 human-written examples

The days of ex post facto price justification are over.

The New York Times

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

"I don't want to hear any ex post facto complaining".

The Guardian

Post facto, Gordon Cooper, one of the Original Seven, suggested John Glenn as an alternative.

The New Yorker

Ex post facto, Ramadan has run afoul of the Patriot Act.

The New Yorker

Human-verified similar examples from authoritative sources

Similar Expressions

13 human-written examples

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

Any other conclusion is nothing but ex-post facto rationalization to preserve the myth.

Huffington Post

Frank is emotionally ruined but does not realise it, except in post-facto fits and starts.

The Economist

Expert writing Tips

Best practice

In scientific writing, specifically use it when referring to an "ex post facto design", which involves examining a pre-existing condition to study its effects.

Common error

While grammatically correct, using "post facto" in everyday speech or informal emails can come across as overly pedantic. In these cases, use "after the fact" or "later" to maintain a natural flow.

Linguistic Context

As noted by Ludwig AI, the phrase "post facto" functions primarily as an adverbial phrase meaning "after the fact". It modifies verbs or entire clauses to indicate that the action happened retrospectively. In scientific literature found in Ludwig, it also functions as an attributive adjective in the fixed phrase "ex post facto research design".

Expression frequency: Common

Frequent in

News & Media

45%

Science

40%

Encyclopedias

10%

Less common in

Wiki

3%

Formal & Business

1%

Social Media

1%

Ludwig's WRAP-UP

The phrase "post facto" is a robust and formal Latin expression widely accepted in standard English writing. According to Ludwig, it is most frequently employed in legal, scientific, and journalistic contexts to describe something that occurs or is created after a particular event has taken place. Whether used as the full legal phrase "ex post facto" or the slightly shorter "post facto", it carries a tone of authority and precision. It is particularly essential in research methodology to describe studies that analyze existing data. While it is perfectly correct, writers should be mindful of its formality and consider alternatives like "after the fact" when communicating with a general audience.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

after the fact

More common and less formal English equivalent

ex post facto

Full legal Latin expression often used to refer specifically to retroactive laws

retroactively

Adverbial form focusing on the application of something to the past

post-hoc

Latin term meaning 'after this', often used in logic and statistics

retrospectively

Focuses on looking back at past events rather than just the timing of an action

ex-post

Shortened version frequently used in economic and financial modeling

in hindsight

Idiomatic expression focusing on the wisdom gained after an event

subsequently

Describes something that follows in time without the specific 'retrospective justification' nuance

afterward

Simple chronological descriptor for subsequent events

backdated

Specific to documents or payments that are assigned a date in the past

FAQs

How do I use "post facto" in a sentence?

You can use it as an adverb or adjective to describe actions taken after an event. For example, "The decision was justified "post facto"" or "The study used an "ex post facto design"".

What is the difference between "post facto" and "ex post facto"?

While often used interchangeably, "ex post facto" is the standard Latin phrase used in legal contexts (meaning 'from a thing done afterward'), whereas "post facto" is a slightly shortened version often found in academic and journalistic writing.

What can I say instead of "post facto"?

In less formal contexts, you can use ""after the fact"", "retroactively", or "in retrospect" depending on your specific meaning.

Is it "post-facto" with a hyphen or without?

Both are used, but the version without a hyphen is more common for the Latin phrase. You might see the hyphenated version "post-facto" when it is used as a compound adjective preceding a noun.