雅思词汇（综合） - 确定性和不确定性

to express confidence or certainty in something happening or being the case

确定

the state of being sure about something, usually when there is proof

肯定

the belief in one's own ability to achieve goals and get the desired results

信心

a state of disorder in which people panic and do not know what to do

混乱状态

strongly holding political or religious views

确信

to make sure that something will happen

保证某事的发生

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

明确的

to think or believe that it is possible for something to happen or for someone to do something

假设某事

to predict future events, based on analysis of present data and conditions

预测

to pause before saying or doing something because of uncertainty or nervousness

变得犹豫不决

bound to happen in a way that is impossible to avoid or prevent

不可避免的

(mathematics) a number representing the chances of something specific happening

概率（数学）

in a way or by some method that is not known or certain

不知何故

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

to think that something is probably true, especially something bad, without having proof

怀疑某事

displaying confidence in oneself and one's capabilities

自信的

according to facts instead of opinions

improbable or unlikely to happen or be the case

不可能的

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

犹豫不决

an explanation based on limited facts and evidence that is not yet proved to be true

假设

a logically contradictory statement that might actually be true

自相矛盾的说法

in a way that is not certain or definite and might be changed later

姑且

something about which one cannot be certain

不确定

in a way that is definite and cannot be rejected or questioned

in a way that shows confidence and trust in oneself or another person's abilities, plans, etc.

信心十足地

the act of saying what one thinks is going to happen in the future or what the outcome of something will be

预测

having a low chance of happening or being true

牵强的

using the previous knowledge, reasoning, or general facts to decide the likely result of something

先验

in a way that is certain and beyond any doubt

坚决地

a belief that something is true without any proof

假定