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ACT Humanities - Certainty and Uncertainty

Here you will learn some English words related to certainty and uncertainty, such as "speculate", "hearsay", "alleged", etc. that will help you ace your ACTs.

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ACT Vocabulary for Humanities
definite
[Adjective]

expressed with clarity and precision, leaving no doubt as to the meaning or intention

Ex: She gave definite answer about attending the meeting .
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inarguable
[Adjective]

beyond debate or argument

Ex: The teaminarguable dedication to their work led to remarkable achievements .
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undeniable
[Adjective]

clearly true and therefore impossible to deny or question

Ex: The results of the experiment undeniable, confirming the hypothesis .
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conclusive
[Adjective]

providing clear and final evidence or proof, leaving no doubt or uncertainty

Ex: conclusive results of the survey revealed a clear preference for the new product .
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infallible
[Adjective]

incapable of making mistakes or being wrong

Ex: infallible instincts guided him to success in every decision .
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unequivocal
[Adjective]

expressing one's ideas and opinions so clearly that it leaves no room for doubt

Ex: She made unequivocal statement about her position on the issue .
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definitive
[Adjective]

settling an issue authoritatively and leaving no room for further doubt or debate

Ex: They reached definitive agreement after long negotiations .
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undeniable
[Adjective]

clearly true and therefore impossible to deny or question

Ex: The results of the experiment undeniable, confirming the hypothesis .
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evident
[Adjective]

easily perceived by the mind or senses

Ex: The impact of the pandemic evident in the deserted streets and closed businesses .
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indisputable
[Adjective]

fully established or proven beyond any doubt

Ex: The judge ruled based on indisputable evidence provided by the witness testimony .
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assurance
[noun]

the state of feeling confident, certain, or self-assured about one's abilities, decisions, or actions

Ex: The mentor 's guidance provided the aspiring artist assurance as they navigated the challenges of a creative career .
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to ensure
[Verb]

to make sure that something will happen

Ex: The ensured the safety of the passengers during the storm .
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to determine something with certainty by careful examination or investigation

Ex: We ascertaining the availability of resources .
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undoubtedly
[Adverb]

used to say that there is no doubt something is true or is the case

Ex: The team 's victory undoubtedly due to their hard work and excellent strategy .
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absolutely
[Adverb]

used for strong emphasis or exaggeration

Ex: absolutely crushed the interview .
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tentative
[Adjective]

not firmly established or decided, with the possibility of changes in the future

Ex: The company made tentative offer to the candidate , pending reference checks .
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dubious
[Adjective]

(of a person) unsure or hesitant about the credibility or goodness of something

Ex: They dubious about his commitment to the team after his repeated absences .
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skeptical
[Adjective]

having doubts about something's truth, validity, or reliability

Ex: The journalist maintained skeptical perspective , critically examining the sources before publishing the controversial story .
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alleged
[Adjective]

asserted or claimed to be true, but not yet proven

Ex: She testified about alleged incident , but there was no evidence to support her claims .
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questionable
[Adjective]

doubtful or uncertain in terms of quality, reliability, or legitimacy

Ex: A man questionable character may not be the best to trust .
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inconclusive
[Adjective]

not producing a clear result or decision

Ex: The results of the experiment inconclusive, requiring further testing to reach a clear outcome .
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plausible
[Adjective]

seeming believable or reasonable enough to be considered true

Ex: The witness provided plausible account of the events leading up to the accident , based on her observations .
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hesitant
[Adjective]

uncertain or reluctant to act or speak, often due to doubt or indecision

Ex: The actor hesitant to take on the emotionally demanding role in the play .
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putative
[Adjective]

considered true and accepted by all but not known for a fact

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unpredictable
[Adjective]

unable to be predicted because of changing many times

Ex: The stock market unpredictable, with prices fluctuating rapidly throughout the day .
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prospective
[Adjective]

likely to become a reality in the future

Ex: The real estate agent provided a virtual tour of prospective home to interested buyers .
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potential
[Adjective]

having the possibility to develop or be developed into something particular in the future

Ex: They potential candidates for the vacant position .
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the probability or chance of something occurring

Ex: Despite likelihood of encountering challenges along the way , they remained optimistic about reaching their goal .
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something about which one cannot be certain

Ex: The company 's future is filled uncertainty after the sudden resignation of its CEO .
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hunch
[noun]

a feeling or intuition about something, often without conscious reasoning or evidence

Ex: He could n’t explain why , but he had a hunch that they would win the game .
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prospect
[noun]

the likelihood or possibility of something becoming successful in the future

Ex: The student was thrilled about prospect of attending a prestigious university .
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scenario
[noun]

a hypothetical sequence of events or a plausible situation that could unfold

Ex: The scientist presented a worst-case scenario for climate change, emphasizing the need for immediate action.
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suspicion
[noun]

a feeling of doubt or mistrust towards someone or something, often without concrete evidence or proof

Ex: The community was filled suspicion about the new mayor ’s intentions .
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hearsay
[noun]

information that is heard from someone else, rather than being firsthand knowledge

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a lingering uncertainty or hesitation that prevents full acceptance or commitment to something

Ex: The teacher reservations about the new teaching method but decided to give it a try .
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an idea that is based on guesswork and not facts

Ex: The author presented conjecture about historical events in her latest book .
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to form a theory or opinion about a subject without knowing all the facts

Ex: Neighbors speculating about the reasons for the sudden increase in security measures .
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to propose a theory or explanation based on limited evidence

Ex: To solve the engineering problem , the hypothesized that the structural weaknesses causing the issue might be due to material fatigue .
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to express various scenarios about something without necessarily basing it on evidence or facts

Ex: theorized for hours but could n’t agree on a single explanation .
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to come to a conclusion without enough evidence

Ex: After receiving vague responses , surmised that there might be issues with the communication channels .
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supposedly
[Adverb]

used to suggest that something is assumed to be true, often with a hint of doubt

Ex: supposedly has insider information , but we should verify the facts before making any decisions .
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ACT Humanities
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