the truth-functional relationship which obtains between any two propositions having the same truth value (either both true or both false); a case…
(a) a set of statements that are components of a given complex statement and are true for a particular assignment of truth values to all the…
a word or symbol signifying that the proposition to which it attaches is a necessary truth.
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。