tautological
adjective uk/ˌtɔː.təˈlɒdʒ.ɪ.kəl/ us/ˌtɑː.t̬əˈlɑː.dʒɪ.kəl/
（无必要并通常无意识）同义反复的
using two words or phrases that express the same meaning, in a way that is unnecessary and usually unintentional
The phrase "advance planning" is tautological since when else are you going to plan something? 短语“提前计划”是同义反复的一个例子，因为你还能在其他什么时候计划呢？
（逻辑术语）重言的
in logic (= a formal scientific method of examining ideas), relating to a statement that is always true
If "Jones" is a proper name, then "Jones exists" is tautological. 如果“琼斯”是一个专名，那么“琼斯存在”就是重言式。
- More examples
- The phrase "water baptism" is tautological as baptism is always with water.
- Do you protect workers or do you protect jobs? The question might seem tautological, but there is indeed a difference.
- The axiom that “existence exists,” is intended not as the mere tautological observation that “whatever exists, exists,” but rather as a recognition that something does indeed exist.
- That statement may be the mathematical equivalent of a tautological error.
See: tautology