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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

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

[Adjective]
inarguable

beyond debate or argument

[Adjective]
undeniable

clearly true and therefore impossible to deny or question

[Adjective]
conclusive

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

[Adjective]
infallible

incapable of being wrong, making mistakes, or failing

[Adjective]
unequivocal

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

[Adjective]
definitive

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

[Adjective]
undeniable

clearly true and therefore impossible to deny or question

[Adjective]
evident

clearly noticeable or easily perceived by the mind or senses

[Adjective]
indisputable

clearly true therefore leaving no room for disagreement or denial

[Adjective]
assurance

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

[noun]
to ensure

to make sure that something will happen

[Verb]
to ascertain

to determine something with certainty by careful examination or investigation

[Verb]
undoubtedly

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

[Adverb]
absolutely

to a full or complete degree, without restriction

[Adverb]
tentative

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

[Adjective]
dubious

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

[Adjective]
skeptical

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

[Adjective]
alleged

said or claimed to be true, but not yet proven or verified

[Adjective]
questionable

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

[Adjective]
inconclusive

not producing a clear result or decision

[Adjective]
plausible

seeming believable or reasonable enough to be considered true

[Adjective]
hesitant

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

[Adjective]
putative

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

[Adjective]
unpredictable

unable to be predicted because of changing many times

[Adjective]
prospective

likely to become a reality in the future

[Adjective]
potential

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

[Adjective]
likelihood

the probability or chance of something occurring

[noun]
uncertainty

something about which one cannot be certain

[noun]
hunch

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

[noun]
prospect

the likelihood or possibility of something becoming successful in the future

[noun]
scenario

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

[noun]
suspicion

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

[noun]
hearsay

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

[noun]
reservation

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

[noun]
conjecture

an idea that is based on guesswork and not facts

[noun]
to speculate

to form a theory or opinion about a subject without knowing all the facts

[Verb]
to hypothesize

to make an educational guess or to present a theory or assumption one is not sure about

[Verb]
to theorize

to express various scenarios about something without necessarily basing it on evidence or facts

[Verb]
to surmise

to come to a conclusion without enough evidence

[Verb]
supposedly

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

[Adverb]
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