Word · Frequency #16631
invalidity
逻辑无效；推理不成立
illogicality as a consequence of having a conclusion that does not follow from the premisses
此处特指逻辑推理上的无效，不是泛指失效或病弱。
- 1.
The state of being invalid; lack of validity.
无效的状态；缺乏有效性。
无效的状态；缺乏有效性。；无效；无价值；病弱；[医] 病废；劳动能力丧失
In use
The teacher explained the invalidity of the argument by showing that the conclusion did not follow from the evidence.
You cannot prove the invalidity of his reasoning just because you disagree with the result.
The article pointed out several invalidities in the popular explanation of the economic trend.
the invalidity of sth
常用结构，后接被判断为无效的对象（如论证、结论等）。
The invalidity of his argument was immediately apparent.
他的论证的无效性立即显而易见。
sth's invalidity
所有格形式，语气较正式；实际使用中更常说 the invalidity of sth。
The argument's invalidity was soon recognized.
该论证的无效性很快被认识到。
Common mistakes
The password is invalidity.The password is invalid.
invalidity 是名词，不能放在 be 动词后作表语形容词；表达“某物无效”要用形容词 invalid。若想用名词，可说 the invalidity of the password。
The new evidence can invalidity the conclusion.The new evidence can invalidate the conclusion.
invalidity 是名词，不能用在情态动词 can 后作动词；表达“使……无效”要用动词 invalidate。can 后接动词原形，所以应写 can invalidate。
Connections
Collocations
- logical invalidity
- 逻辑无效；推理不成立
- The philosopher demonstrated the logical invalidity of the argument.这位哲学家指出了该论点的逻辑无效性。
- invalidity of a claim
- 主张无效；说法不成立
- The invalidity of his claim became obvious after a quick check.经过快速核查，他的主张显然不成立。
- declare the invalidity
- 宣布……无效
- The court declared the invalidity of the resolution.法院宣布该决议无效。
- invalidity of a contract
- 合同无效
- The lawyer argued for the invalidity of the contract.律师主张该合同无效。
- invalidity of a premise
- 前提不成立
- The invalidity of the premise undermines the entire theory.前提不成立破坏了整个理论。
Learner notes
Memory Tip
联想 invalid（无效的/病弱者）加名词后缀 -ity，就是“无效；病弱”，像病弱者失去劳动能力。
Context & Register
语域：formal 常见场景：formal logic、legal argumentation、academic writing 这个词表示论证或推理不成立，通常用于逻辑学、哲学和法律等正式书面语境；日常口语中更常说 not valid 或 doesn't hold。
Grammar Note
复数形式为 invalidities。
Pronunciation & Spelling
这些词都以 -ity 结尾，重读元音都是 /ɪ/，后面的音都是 /dɪti/（或 /dəti/），所以与 invalidity /ˌɪnvəˈlɪdɪti/ 押韵。注意：invalidity 与 invalid 拼写相近，但 invalid 读 /ɪnˈvælɪd/（指“无效的”）或 /ˈɪnvəlɪd/（指“体弱多病者”），重音元音不同，不押韵。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.