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TOEIC Link Part 5 — assume vs presume: The Evidence Test That Ends the Coin Flip

Part 5 blanks assume and presume knowing that learners treat them as free synonyms and guess. This guide gives you the evidence test that separates assume (take as given with no proof) from presume (conclude from grounds), maps the fixed business collocations that lock each word, exposes the two traps where only one fits, and works the distractor logic on workplace examples so the pair becomes a rule you apply the same way every time.

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Since the shipment was logged at the depot on Friday, we ____ it cleared customs over the weekend. The options offer assume, presume, resume, and consume, and most learners stall between the first two because assume and presume both translate to roughly "think something is true without confirming it." The answer is presume, and reaching it reliably has nothing to do with meaning-by-feel and everything to do with whether the sentence hands you evidence. This guide gives you the evidence test that assigns the two words every time, plus the fixed business frames TOEIC uses to reward candidates who stopped treating them as interchangeable.

The rule that actually works: no grounds vs stated grounds

Ninety percent of Part 5 items with this pair resolve on one mechanical fact — does the sentence give a reason?

  • assume = take something as true with no evidence offered — a working starting point, often something that later turns out wrong. We assumed the client had received the invoice. (no basis stated)
  • presume = conclude something is true on reasonable grounds — there is a because, a since, a document, a signal. Given the signed contract, we presume the terms are accepted. (grounds stated)

So the test is: scan the sentence for a reason clause. If a since, given, based on, or a cited fact points at the blank, the sentence is reasoning from evidence and wants presume. If the blank floats with no support — a bare hypothesis the speaker is running on — it wants assume. In the opening item, "Since the shipment was logged... we ____" hands you an explicit since clause, so the conclusion rests on grounds: presume. You never weigh which word "feels" right — you locate the evidence and match. This is the same "identify the structural cue first" discipline that governs the difference between imply and infer, where imply pushes meaning out and infer pulls it in, a pair that also collapses the moment you read direction instead of gloss.

Trap 1: the fixed phrase "assuming that" is frozen

Here is the first reversal TOEIC weaponizes. The conjunction-like phrase assuming (that) — meaning "if we take it as given that" — is a frozen collocation, and presuming that is far rarer and usually wrong in a Part 5 frame:

  • **Assuming** the budget is approved, we can begin hiring in March.
  • We will proceed **assuming that** no objections are raised.

Notice there is often no evidence here at all — the phrase sets up a hypothesis for the sake of argument. When the blank opens a conditional "if-we-take-it-as-given" clause at the front of a sentence, the answer is assuming, not presuming, regardless of how much reasoning follows. Match the fixed phrase, not the underlying logic. This "the frozen collocation overrides the general rule" behavior is exactly what makes beside and besides split on set phrases rather than on their shared spatial root.

Trap 2: the legal-formal frame "presumed innocent / presumed dead"

The second reversal appears in higher-register items. Presume owns a formal, almost legal register meaning "regard as true until proven otherwise," locked into fixed expressions:

  • presumed innocent, presumed dead, presumed liable
  • The missing files are presumed lost.

Here the sense is a default conclusion the system holds pending proof — grounded in a rule or convention, so presume, never assume. TOEIC plants assumed as the distractor because it fits the grammar. The tell is the passive-participle frame with a formal outcome word (innocent, lost, dead, liable): that is presumed territory. Read the register, not just the slot.

The business collocations that lock the choice

Part 5 pulls this pair from a stable set of workplace frames. Recognizing the frame settles the word instantly:

  • assume — assume responsibility, assume a role, assume control, assume the worst, let's assume, assuming that. Note the second meaning: assume also means to take on (a duty or position) — She will assume the role of director. That sense has no presume competitor at all.
  • presume — presume to, I presume, presumed innocent, presume in favor of, presumably.

The assume responsibility / assume a role frame deserves a flag: when the object is a duty, title, or position being taken on, the answer is assume on the strength of the collocation, with zero connection to the evidence test. A blank like will ____ the position of regional manager is assume because you take on a role — evidence never enters. This is the same "one word carries an extra sense the other cannot cover" situation you see in affect and effect, where effect quietly doubles as a verb meaning to bring about.

Worked examples

1. Based on the attendance figures, organizers ____ the seminar was a success. Options: assume / presume / resume / consume. The clause opens with Based on the attendance figures — explicit grounds — so presume.

2. We cannot simply ____ the vendor will honor the old pricing; get it in writing. Options: presume / assume / resume / assumed. No evidence is offered — the speaker warns against a baseless working belief — so assume.

3. ____ the shipment arrives on time, the launch date stays fixed. Options: Presuming / Assuming / Assumed / Resuming. This is the frozen sentence-front conditional "take it as given that" — Assuming.

4. The deputy director will ____ full responsibility for the merger. Options: presume / assume / consume / resume. The object is a duty being taken on — the collocation assume responsibility — so assume.

The two-second procedure for exam day

  1. Look for grounds. A since, given, based on, or cited fact pointing at the blank means the sentence reasons from evidence: default presume.
  2. Check for the frozen phrases. Sentence-front Assuming (that) is fixed; the passive-participle presumed innocent/lost/dead frame is fixed. The general rule does not touch either.
  3. Check the object. If it is a duty, role, or position being taken on, the collocation assume wins outright — evidence is irrelevant.

Run those three steps and the pair stops depending on which word sounds more formal — it becomes an evidence-and-collocation exercise you can do the same way every time. For the broader habit of resolving same-meaning choices by structural cue rather than instinct, revisit how imply and infer separate on the direction of meaning rather than the definition.