Advanced Vocabulary for TOEFL - Doubt and Certainty

to let something happen or exist

to estimate something by calculating and guessing

to state an opinion, guess, suggestion, etc. even though there are chances of one being wrong

to come to a conclusion without enough evidence

to give good reasons to justify a particular action

having more than one possible meaning or interpretation

(of a statement or story) unlikely to be authentic, even though it is widely believed to be true

experiencing confusion

without a doubt

(of a person) able to make clear, firm decisions quickly, especially in challenging situations

convinced that everything one believes in is true and others are wrong

having two or more possible meanings

acting or talking with hesitation due to uncertainty or lack of confidence

true in a way that leaves no room for denial or disagreement

remaining strong and effective even when facing challenges or difficulties

the feeling of complete certainty

an idea that is based on guesswork and not facts

shyness due to a lack of confidence in oneself

a guess that is made according to one's experience or knowledge thus is more likely to be true

something that is assumed to be true or already decided upon before any evidence or arguments are presented

a state of being perplexed or uncertain about how to proceed in a situation that is difficult