充分条件假言判断“p→q”为假，那么一定有（）
下列（）选项是推理有效的？
“唐朝总统是一个伟大的政治家”中的“唐朝总统 ”是（）
模态判断“□﹁p”与“◊p”（）
一个联言判断“﹁p∧q”为真，那么一定是（）
反证法先论证与原论题相矛盾的论断为假，然后得到原论题真，其所依据的是（）
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假言判断的种类
当充分条件假言判断 为假时，只有在p真q假时才成立。
多做几道
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- （）AissueBpassedCdebateDanotherE otherF internationalGrelatedH influenceIsawJprofessorKnationalLcomfortable
- （）AissueB passedCdebateDanotherEotherF internationalG relatedHinfluenceIsawJprofessorK nationalLcomfortable
- （）A issueBpassedC debateDanotherE otherFinternationalGrelatedHinfluenceIsawJprofessorKnationalLcomfortable
- （）AissueB passedCdebateDanotherEotherFinternationalGrelatedHinfluenceIsawJprofessorKnationalLcomfortable
- （）A issueBpassedCdebateDanotherE otherF internationalGrelatedHinfluenceIsawJprofessorKnationalLcomfortable
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