i am completely certain

USAGE SUMMARY

The phrase "I am completely certain" is correct and usable in written English.
You can use it when expressing strong confidence or assurance about a particular statement or belief. Example: "After reviewing all the evidence, I am completely certain that our approach will succeed."

✓ Grammatically correct

Human-verified similar examples from authoritative sources

Similar Expressions

59 human-written examples

Not that I was completely certain what "it" was.

The Guardian - Lifestyle

In fact, I'm completely certain she doesn't.

Vice

When I was completely certain I wasn't going to see the horror show I had hoped for, I decided to talk to this guy, who seemed to be the group's most articulate spokesman, even though he wanted to remain nameless.

Vice

The rule of maximizing expected utility leads now to an extremely conservative policy: the best hypotheses \(g\) on \ e\) are those that satisfy \(P(g\mid e) = 1\), i.e., are completely certain on \ e\) (e.g. \ e\) itself and tautologies).

SEP

Accordingly, the uncertainty is least if occupancy of exactly one state is completely certain (i.e., with probability equal to unity, corresponding to zero entropy), whereas the uncertainty is greatest for a uniform probability distribution over all the available states (i.e., with all states being equiprobable, e.g., having a probability of half unity for each state in a two-state system).

BioMed Research International

Are we really sure this is our seam attack for the Ashes?" I don't think we're completely certain about Broad or Finn, but all things being equal they will be in the team.

The Guardian - Sport

As a viewer, I wondered how the crew in Tunis could be completely certain that a stranger found so rapidly and speaking in translation phrases of a generalised kind –the guy used to "drink and gamble" with them before being "radicalised" – really had known the terrorist well.

The Guardian - TV & Radio

I am used to choreography, moral absolutes and a crowd that is completely certain about everything.

The Guardian

And I think that there is enough going on these that one can't be completely certain what is being represented at any point in time.

eLife

A central bank does not need to be completely certain to act.

The Economist

Rejecting the denial, Vice President Francisco Santos said the government "is completely certain that it was the FARC".

The New York Times

Expert writing Tips

Best practice

Use "I am completely certain" when you want to express a very strong level of confidence in a statement or prediction. It conveys a sense of assurance that leaves little room for doubt.

Common error

Avoid using "I am completely certain" when you actually have only a high degree of confidence. Overstating your certainty can undermine your credibility if the outcome proves otherwise.

Linguistic Context

The phrase "I am completely certain" functions as a declarative statement expressing the speaker's absolute conviction. It indicates a state of mind where the speaker holds no doubts about the truth or validity of something. According to Ludwig AI, the phrase is correct and usable in English.

Expression frequency: Missing

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Ludwig's WRAP-UP

The phrase "I am completely certain" is a grammatically sound and emphatic way to express absolute conviction or assurance. According to Ludwig AI, the phrase is correct and usable in English. While example sentences are not currently available, this phrase serves to establish credibility and inspire confidence in the listener. Alternatives such as "I am absolutely sure" or "I have no doubt" can be used to convey similar levels of certainty. Use with caution to avoid overstating confidence when the situation warrants less definitive language.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

i am absolutely sure

Replaces "completely certain" with "absolutely sure", emphasizing certainty with a different adjective.

i am sure without a doubt

Adds emphasis to the certainty by explicitly stating the absence of doubt.

i am entirely confident

Substitutes "completely certain" with "entirely confident", focusing on confidence as the basis for the assertion.

i am fully convinced

Replaces "certain" with "convinced", highlighting a state of strong belief reached through persuasion or evidence.

i have no doubt

Expresses certainty by negating doubt, indicating a firm belief.

i am positive

Uses "positive" to convey certainty, a more informal alternative.

i am of the firm opinion

Presents the certainty as a strong opinion, suggesting a well-considered belief.

it is my firm belief

Shifts the focus to the belief itself being firm, rather than the speaker's state.

i ascertain

Uses a more formal verb "ascertain" to indicate establishing something with certainty.

i am under the impression

Expresses a strong belief based on available information, though potentially less definitive than complete certainty.

FAQs

What does "I am completely certain" mean?

The phrase "I am completely certain" expresses a very strong belief or conviction about something. It indicates that the speaker has no doubts and is fully confident in the truth or accuracy of their statement.

What can I say instead of "I am completely certain"?

You can use alternatives like "I am absolutely sure", "I am entirely confident", or "I have no doubt" depending on the context.

When is it appropriate to use the phrase "I am completely certain"?

Use "I am completely certain" when you want to emphasize your strong conviction and leave little room for questioning. It's suitable when you have strong evidence or a well-reasoned basis for your belief.

Is there a difference between "I am certain" and "I am completely certain"?

Yes, "I am completely certain" implies a higher degree of confidence than simply saying "I am certain". The addition of "completely" intensifies the level of assurance.