Arguably vs Possibly vs Presumably

When to use each in English, with meaning, register, and examples.

Arguably

Top 2,000 (common)C1adverb

Possibly

Top 2,000 (common)B1adverb

Presumably

Top 5,000 (fairly common)C1adverb
 ArguablyPossiblyPresumably
Pronunciation🇬🇧 /["/ˈɑːɡjuəbli/"]/🇺🇸 /["/ˈɑːrɡjuəbli/"]/🇬🇧 /["/ˈpɒsəbli/"]/🇺🇸 /["/ˈpɑːsəbli/"]/🇬🇧 /["/prɪˈzjuːməbli/"]/🇺🇸 /["/prɪˈzuːməbli/"]/
MeaningIt can be said that something is true.maybe or maybe not; not sureIt is likely or expected that something is true.
ExampleHe is arguably the best actor of his generation.It could possibly rain tomorrow, so take an umbrella.Presumably this is where the accident happened.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)Top 5,000 (fairly common)
CEFR levelC1B1C1
Part of speechadverbadverbadverb
Collocationsarguably the best, arguably true, arguably effectivepossibly true, possibly available, possibly dangerouspresumably true, presumably based, presumably understood
Antonymsundeniably, certainly, definitely, incontrovertiblydefinitely, certainlydoubtfully, questionably
Common mistakesUsing 'arguably' too strongly without supporting evidence., Confusing it with 'arguably' as a noun., Forgetting to follow it with a specific claim or statement.'Possibly' is often confused with 'probably'—they mean different things., Learners may omit 'possibly' in sentences where it's needed., Some learners incorrectly use 'possibly' with the gerund form (e.g., 'possibly going').Used in informal situations where a casual word would be better., Confused with 'presume', which has a different grammatical structure., Overused in statements where certainty is needed.
Usage notesUse 'arguably' when making a statement that can be supported with evidence. It is often used in discussions or debates but may be too strong for casual conversation.Use 'possibly' when you want to express uncertainty or doubt about something. It's generally neutral, suitable for both spoken and written contexts, but avoid it in very formal writing where you might prefer words like 'potentially'.Use 'presumably' when you think something is true but don't have definite proof. It’s more formal than using 'probably' and is often used in writing or serious conversations.

Frequently asked questions: Arguably vs Possibly vs Presumably

What's the difference between Arguably, Possibly, and Presumably?

Arguably: It can be said that something is true. Possibly: maybe or maybe not; not sure Presumably: It is likely or expected that something is true.

Are Arguably, Possibly, and Presumably the same CEFR level?

Arguably: C1, Possibly: B1, Presumably: C1 on the CEFR scale.

What part of speech are Arguably, Possibly, and Presumably?

Arguably: adverb, Possibly: adverb, Presumably: adverb.

Can you show an example of each?

Arguably: He is arguably the best actor of his generation. Possibly: It could possibly rain tomorrow, so take an umbrella. Presumably: Presumably this is where the accident happened.

Can I use Arguably, Possibly, and Presumably interchangeably?

Not always. Arguably, Possibly, and Presumably are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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