原与逆否两等价 ,正难则反反证法 .(ｆ儯)假设结论不成立 ,步步推理矛盾“差” .(ｃｈ仭)追问原因为何由 ,错误就在题设假 .( ｊｉ儯)“ ｐ”为假 ,则“ｐ”真 ,奇妙证法就是“它” .(ｔ仭)注 :“差”指“差别” .反证法(诗一首)$湖南省衡阳县职业中专@彭国应 The original and the opposite are not equal, but when it is difficult, the anti-counterfeiting method (f儯) assumes that the conclusion is not established, and the step-by-step reasoning contradiction is “poor.” (ch仭) The reason why the question is asked is based on the fact that the error is false in the question. (ji儯) “p” is false, then “p” is true, and the wonderful proof is “it” (t仭) Note: “poor” means “difference”. Anti-evidence (poetry) $ Hengyang County Vocational College @ Peng Guoying