Probably vs. Certainly — What's the Difference?
By Tayyaba Rehman & Fiza Rafique — Updated on March 18, 2024
"Probably" suggests a high likelihood or chance of something happening, whereas "certainly" conveys absolute assurance or confidence in an outcome.
Difference Between Probably and Certainly
Table of Contents
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Key Differences
"Probably" indicates that there is a strong possibility of an event or fact being true, but it leaves room for doubt or uncertainty. It's often used when the speaker believes something is likely based on available evidence or logical inference, but acknowledges that outcomes can be unpredictable. On the other hand, "certainly" is used to express complete confidence or certainty about an event or fact, with no room for doubt.
While "probably" reflects a degree of speculation or educated guesswork about future events or the truth of a statement, "certainly" implies that the speaker has no doubts about the accuracy or occurrence of the stated fact or event. This distinction is crucial in communication, as it helps set the listener's expectations regarding the likelihood of the discussed scenarios.
In decision-making, "probably" suggests that choices are being made based on probabilities and risk assessments, which is common in scenarios with incomplete information. In contrast, decisions stated with "certainly" imply a strong foundation of knowledge or evidence, leading to definitive conclusions and actions.
The use of "probably" is common in everyday language to indicate likelihoods or to make predictions about uncertain outcomes, such as weather conditions, personal plans, or the results of an action. "Certainly," however, is often used in contexts requiring affirmation, reassurance, or when the speaker wishes to convey decisiveness and clarity, such as in formal agreements, guarantees, or when confirming arrangements.
In the context of communication, the choice between "probably" and "certainly" can significantly affect the tone and implication of a message. "Probably" softens statements, making them appear less dogmatic and more open to other possibilities, which can be useful in diplomatic or sensitive conversations. Conversely, "certainly" conveys a strong, confident stance, which can be reassuring or assertive but might also come across as inflexible or dismissive of alternatives.
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Comparison Chart
Definition
Indicates a high likelihood or chance, but not certainty
Conveys absolute assurance or confidence
Degree of Certainty
High likelihood with some room for doubt
Complete confidence with no doubt
Usage Context
Speculation, educated guesses, predictions
Affirmation, reassurance, decisiveness
Communication Tone
Less dogmatic, open to possibilities
Strong, confident, sometimes inflexible
Decision-Making
Based on probabilities, often with incomplete information
Based on conclusive evidence or incontrovertible facts
Compare with Definitions
Probably
Suggests that something is likely to happen or be true, but not guaranteed.
It will probably rain later based on the forecast.
Certainly
Used to express complete confidence or assurance about a fact or future event.
The meeting will certainly end before noon.
Probably
Commonly used to express likelihoods or expectations about future events.
She will probably finish the project by tomorrow.
Certainly
Provides strong confirmation or agreement.
You can certainly count on my support for the project.
Probably
Indicates a degree of uncertainty, often based on partial evidence or logical inference.
They're probably stuck in traffic, considering the time.
Certainly
Reflects decisiveness and a clear course of action.
We will certainly appeal the decision.
Probably
Implies that plans or outcomes are subject to change.
We'll probably go to the beach this weekend, weather permitting.
Certainly
Conveys a sense of authority, clarity, and reliability, leaving no room for doubt.
You are certainly qualified for this position.
Probably
Softens statements, making them less definitive and more accommodating of unforeseen changes.
I'll probably join you for dinner if I get out of work on time.
Certainly
Indicates that something is assured or beyond doubt.
With these improvements, success is certainly guaranteed.
Probably
Most likely; presumably.
Certainly
Undoubtedly; definitely
This is certainly not my writing.
Probably
In all likelihood.
Certainly
By all means; of course
You may certainly join us.
Probably
In a probable manner; in likelihood.
Distinguish between what may possibly and what will probably be done.
Certainly
Surely
They certainly are hard workers.
Probably
With considerable certainty; without much doubt;
He is probably out of the country
In all likelihood we are headed for war
Certainly
In a way which is certain; with certainty.
Probably
Easy to believe on the basis of available evidence;
He talked plausibly before the committee
He will probably win the election
Certainly
Without doubt, surely.
The accident was certainly caused by human error.
That was certainly sweet of him.
You may certainly join us for dinner.
Certainly
An emphatic affirmative answer; of course.
Would you like it with ice?
Certainly, and with lemon please.
Certainly
Without doubt or question; unquestionably.
Common Curiosities
What does "probably" mean?
"Probably" indicates that there is a strong likelihood of something happening or being true, but it's not certain.
Is "certainly" suitable for all types of communication?
"Certainly" is suitable when clear, decisive communication is required, but it might be too strong or inflexible for situations where sensitivity or openness to change is needed.
How do "probably" and "certainly" differ in terms of certainty?
"Probably" suggests a high likelihood with some room for doubt, whereas "certainly" denotes complete confidence and no room for doubt.
Can the use of "probably" imply uncertainty?
Yes, while "probably" suggests a high likelihood, it also implies a degree of uncertainty or openness to other outcomes.
When is "certainly" used in affirmations?
"Certainly" is used in affirmations when offering strong confirmation, support, or agreement, often to reassure the listener.
Can "probably" be used for making plans?
Yes, "probably" can be used when making plans that are tentative or subject to change based on future conditions or information.
What does "certainly" convey?
"Certainly" conveys absolute assurance or confidence about an event, fact, or decision, without any doubt.
How does context influence the choice between "probably" and "certainly"?
The choice between the two depends on the desired level of certainty, the nature of the information, and the communication context.
What role does evidence play in using "certainly"?
Using "certainly" typically implies that there is strong evidence or incontrovertible facts supporting the statement or decision.
Can "certainly" ever be misleading?
If used without genuine assurance, "certainly" can be misleading by suggesting a level of confidence that is not backed by facts or evidence.
How does "probably" affect decision-making?
In decision-making, "probably" implies that choices are made based on likelihoods and risk assessments, often with incomplete information.
Is it appropriate to use "probably" in formal contexts?
"Probably" can be used in formal contexts when expressing likelihoods, but the level of formality may dictate a preference for more definite terms.
How does "certainly" impact the tone of a message?
"Certainly" can make a message appear more authoritative and definitive, which can be reassuring but sometimes perceived as inflexible.
How do cultural differences affect the interpretation of "probably" and "certainly"?
Cultural differences can influence how these terms are perceived, with some cultures viewing "probably" as more non-committal and "certainly" as overly assertive.
How can "probably" and "certainly" be used effectively in negotiations?
"Probably" can introduce flexibility and openness to compromise, while "certainly" can assert firm positions or non-negotiable points.
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Written by
Tayyaba RehmanTayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.
Co-written by
Fiza RafiqueFiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
