One idea, different words
Reformulation does not add new evidence or change the conclusion. It recodes the main statement so that it is easier for the audience to understand. Therefore, negation, degree of certainty, quantity, time limits, and other essential details must remain after the marker.
The most reliable test is to ask the same question of both formulations: could they be true and false in the same circumstances? If the second sentence merely gives a case, a reason, or a result, that is a different relationship.
statement → reformulation marker → the same main idea in a more accessible form
The intervention had a negligible effect. In other words, it barely changed the outcome.
The intervention had a negligible effect. In other words, it barely changed the outcome.
The second part replaces the formal negligible effect with the more familiar barely changed, without adding a separate reason or example.
The process is asynchronous. Put differently, participants do not need to be online at the same time.
The process is asynchronous. Put differently, participants do not need to be online at the same time.
The technical term is expanded into a practically understandable condition for participants.
Markers of equivalent explanation
In other words and put differently explicitly signal that a different formulation of the previous idea follows. That is often introduces a more precise explanation or an explicit expansion of what already follows from the first part. All three markers can begin a new sentence.
The marker itself does not guarantee equivalence. The writer is still responsible for ensuring that the second part does not strengthen may to must, replace some with all, or turn a description into a causal conclusion.
statement. In other words / Put differently / That is, the same idea in different words.
The decision is reversible; that is, it can be undone later.
The decision is reversible; that is, it can be undone later.
That is replaces reversible with the synonymous can be undone and preserves the modality of can.
Access is restricted to verified users. Put differently, unverified users cannot enter.
Access is restricted to verified users. Put differently, unverified users cannot enter.
The second part shows the same boundary through the opposite group and preserves the absolute restriction.
Or rather: correcting what has just been said
Or rather differs from the neutral in other words: the speaker withdraws or clarifies the previous choice of words. The first version turns out to be too broad, inaccurate, or simply wrong; the second replaces it.
Because of this function, the two parts do not have to be fully equivalent. It is important for the reader to see clearly which element has been corrected, while the rest of the message remains unchanged unless necessary.
initial formulation — or rather, corrected formulation
The deadline is Friday—or rather, 5 p.m. on Friday.
The deadline is Friday—or rather, 5 p.m. on Friday.
The second version narrows the imprecise reference to a day to a specific time.
We interviewed the managers, or rather the two regional managers.
We interviewed the managers, or rather the two regional managers.
Before a short noun phrase after or rather, a separate comma is not obligatory; this is not a parenthetical full clause.
Preserving limits and degree of certainty
At C1 level, the main risk is not choosing the marker but making an unnoticed change in logical force. May, might, and probably cannot be paraphrased as definitely; only must not be lost; not all does not equal none.
It is useful to underline the words that set the limits of the statement before paraphrasing the rest. If there is no exactly equivalent alternative, it is better to preserve the original modal verb or quantity expression.
may → there is a possibility; only X → X and nothing else; not all → not everyone, with at least one exception
The estimate may be inaccurate. In other words, there is a possibility that the figure is wrong.
The estimate may be inaccurate. In other words, there is a possibility that the figure is wrong.
Possibility preserves the caution of may; the categorical the figure is wrong would be a stronger statement.
Not all requests were rejected. Put differently, at least one request was not rejected.
Not all requests were rejected. Put differently, at least one request was not rejected.
The paraphrase correctly transfers the scope of negation and does not replace not all with none.
Position and punctuation
At the beginning of a new sentence, In other words, Put differently, and That is are usually followed by a comma. Inside a clause, a parenthetical marker is set off on both sides: The process is, in other words, reversible.
In standard formal writing, two independent parts are not joined only by commas around the marker. A full stop, semicolon, or appropriate dash is needed before the marker. Commas on both sides of the marker are suitable for an insertion within one part.
Or rather has more flexible punctuation: a comma often follows rather before a full corrective clause, but it may be absent before a short noun phrase. Choose punctuation according to the structure of the particular sentence.
A. In other words, B. / A; in other words, B. — A and B are independent parts; within one part: The process is, in other words, reversible.
The two measures are equivalent; in other words, they produce the same result.
The two measures are equivalent; in other words, they produce the same result.
The semicolon separates two independent clauses, while the comma closes the opening marker in the second.
The process is, in other words, reversible.
The process is, in other words, reversible.
Here the marker is genuinely parenthetical within one clause, so it has commas on both sides.
Not an example, not a result, and not a new definition
For example and for instance illustrate a general idea with an individual case; therefore and as a result draw a conclusion; by contrast creates a contrast. These relationships are useful, but they are not equivalent reformulation.
Namely usually names specific elements, while explaining the word itself may be a definition of a term. Here we focus on reformulating an idea that has already been expressed and on explicit self-correction.
The service is intermittent. In other words, it is available only from time to time.
The service is intermittent. In other words, it is available only from time to time.
The second part explains the meaning of intermittent without giving one particular instance of a failure.
The service is intermittent. For example, it was unavailable yesterday morning.
The service is intermittent. For example, it was unavailable yesterday morning.
This is an example, not an equivalent paraphrase: one failure yesterday does not exhaust the meaning of intermittent.
Transferring this into professional and academic speech
A strong reformulation takes the audience into account. For a specialist, you can retain a concise term; for a wider audience, you can expand it into an action, condition, or consequence already contained in the term’s meaning.
In a longer text, do not mechanically paraphrase every sentence. A marker is appropriate where the first version may genuinely be abstract, ambiguous, or too broad. In dialogue, reformulation can also check understanding: So, in other words, you’re saying …?
Attendance is optional. Put differently, participants can choose whether to attend.
Attendance is optional. Put differently, participants can choose whether to attend.
Optional is explained through the possibility of choice. The second sentence preserves the meaning and does not turn a possibility into an obligation.
So, in other words, you’re saying that approval must come before publication—is that right?
So, in other words, you’re saying that approval must come before publication—is that right?
The speaker restates what they heard and asks for confirmation without attributing a new reason to the other person.
Common mistakes
Incorrect:The two measures are equivalent, in other words, they produce the same result.
Correct:The two measures are equivalent; in other words, they produce the same result.
Two independent clauses cannot be joined only by commas around a parenthetical marker; a semicolon or full stop is needed here.
Incorrect:The process is reversible. Put differently, able to return to its earlier state.
Correct:The process is reversible. Put differently, it can return to its earlier state.
A complete sentence part is intended after the marker, so the subject it and the finite form can return are needed.
Incorrect:The system is adaptive. In other words, it respond to new data.
Correct:The system is adaptive. In other words, it responds to new data.
In the third-person singular Present Simple, the verb has the form responds; the marker does not change subject–verb agreement.
Incorrect:The deadline is flexible—or rather, it can extending by two days.
Correct:The deadline is flexible—or rather, it can be extended by two days.
A base form is required after the modal can. For the passive, use be + past participle: can be extended.