Arguably vs Presumably

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

Arguably

Top 2,000 (common)C1adverb

Presumably

Top 5,000 (fairly common)C1adverb
Most common: Arguably
 ArguablyPresumably
Pronunciation🇬🇧 /["/ˈɑːɡjuəbli/"]/🇺🇸 /["/ˈɑːrɡjuəbli/"]/🇬🇧 /["/prɪˈzjuːməbli/"]/🇺🇸 /["/prɪˈzuːməbli/"]/
MeaningIt can be said that something is true.It is likely or expected that something is true.
ExampleHe is arguably the best actor of his generation.Presumably this is where the accident happened.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelC1C1
Part of speechadverbadverb
Collocationsarguably the best, arguably true, arguably effectivepresumably true, presumably based, presumably understood
Antonymsundeniably, certainly, definitely, incontrovertiblydoubtfully, 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.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 '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 Presumably

What's the difference between Arguably and Presumably?

Arguably: It can be said that something is true. Presumably: It is likely or expected that something is true.

Which is more common: Arguably and Presumably?

Arguably is the most common in everyday English.

Are Arguably and Presumably the same CEFR level?

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

Can I use Arguably and Presumably interchangeably?

Not always. Arguably 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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