These are mid-clause distancing adverbs.
They are inserted into the middle of a sentence (often between commas) to show the speaker's attitude toward the truth, certainty, or source of the information, rather than stating it as an established fact.
What are distancing adverbs?
Distancing adverbs create a degree of distance between the speaker and the statement. Instead of saying something is definitely true, the speaker indicates that it is:
based on appearance,
reported by others,
assumed,
claimed,
or open to interpretation.
They are common in academic writing, journalism, formal reports, and legal writing because they avoid making unsupported claims.
Sentence pattern
Subject + , + distancing adverb + , + verb
Example:
The committee, apparently, had reached a decision.
The commas indicate that the adverb interrupts the sentence rather than modifying the verb directly.
Common distancing adverbs
Adverb
Meaning
apparently
It seems true based on available evidence.
supposedly
People claim it is true, but it may not be.
presumably
It is logically assumed.
reportedly
According to reports.
allegedly
Claimed without proof.
seemingly
It appears to be true.
evidently
The evidence strongly suggests it.
arguably
It can reasonably be argued.
theoretically
In theory, but perhaps not in practice.
ostensibly
Officially or apparently, but perhaps not actually.
surprisingly
Contrary to expectation.
curiously
In an unusual or interesting way.
remarkably
In a notably surprising manner.
Difference in meaning
Apparently
Based on what people can see or know.
The train, apparently, left earlier than scheduled.
(The speaker isn't completely certain.)
Reportedly
According to news or other reports.
The actor, ** reportedly**, has signed a new contract.
(The speaker is reporting information from another source.)
Allegedly
Someone claims something happened, but it has not been proven.
The company, allegedly, violated environmental regulations.
Presumably
A logical assumption.
The package, presumably, arrived yesterday.
Arguably
An opinion that can reasonably be defended.
This invention, arguably, changed modern medicine.
Five original examples
The scientist, apparently, discovered an error in the original experiment.
The company, reportedly, plans to open three new offices next year.
The suspect, allegedly, entered the building through a rear entrance.
The proposal, presumably, will receive approval after further revisions.
Her latest novel, arguably, is the finest work of her career.
Why use these adverbs?
They help writers:
avoid sounding too certain,
indicate the source of information,
distinguish facts from opinions or assumptions,
write more objectively,
express caution and precision.
Compare:
Certain:
The manager approved the budget.
Distanced:
The manager, apparently, approved the budget.
The second sentence suggests the speaker believes this happened but is not asserting it as an indisputable fact.
Quick practice
Choose the best adverb:
The athlete, ________, tested positive for a banned substance, although the investigation is still ongoing.
allegedly
The museum, ________, will reopen next month after renovations.
reportedly
The solution, ________, is the most efficient available.
arguably
The lights, ________, were left on all night.
apparently
The machine, ________, should operate normally after the update.
presumably
These examples illustrate how mid-clause distancing adverbs let you express different degrees of certainty, evidence, or attribution while maintaining a formal, objective tone.