| 单词 | contravalid | 
| 释义 | contravalidadjective  con·tra·valid   ¦kän‧trə+ 1   : having no validity : false, indefensible   2  logic, of a sentence or class of sentences   : having every sentence in the system as a consequence : self-contradictory    contravalidity  ¦kän‧trə+  plural -es | 
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