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邏輯與數(shù)學

時間:2023-01-13 05:01:01   來源:文章閱讀網(wǎng)  作者:網(wǎng)絡整理  點擊數(shù):20    

三個人一起住店,店主說,一間房每晚30塊。三人各自付了10塊。次日一早,店主發(fā)現(xiàn)搞錯了,他們住的那間房只要25塊。就給了店小二5塊,讓他還給三人。半路上,店小二起了貪念,從中拿了2塊,剩下的3塊給了三人。那三人不明白其中的原委,但3塊錢分起來倒更簡單,每人各拿1塊。

問題是三人住店,每人實際支付了9塊,合計27塊。店小二從中貪了2塊。27加2等于29塊。明明前一晚三人掏了30塊,那另1塊去哪里了?這道數(shù)學題,我小時候算了很久,一直沒搞明白。

后來一個朋友指點我說,不是所有的數(shù)字都能任意加減乘除。一群羊加另一群羊,仍是一群羊。一頭牛加一匹馬不等于二頭牛,更不等于二匹馬。數(shù)學不僅僅是簡單的運算,任何算法的背后都有著現(xiàn)實的邏輯關(guān)系。失去了邏輯關(guān)系,所有的算法都是耍流氓!

社會學的邏輯關(guān)系也一樣。有些人說的每一句話都很正確,邏輯鏈也貌似合理,但推導出的結(jié)論卻荒誕不羈。

一只蜘蛛,邊上放一個銅鑼。敲一下“咣”的一聲,蜘蛛跑了,說明蜘蛛是有聽力。蜘蛛抓回來,把腳砍掉,再敲一下鑼,蜘蛛沒跑,說明蜘蛛的耳朵長在腳上。這就是某些人似是而非的道理。

回到本文的開頭,那道題在邏輯上究竟有什么問題?

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