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形(xíng )式(shì )逻(luó )辑(jí )的(de )基(jī )本(běn )规(guī )律(lǜ )之(zhī )一(yī )。要(yào )求(qiú )在(zài )同(tóng )一(yī )思(sī )维(wéi )过(guò )程(chéng )中(zhōng )，对(duì )同(tóng )一(yī )对(duì )象(xiàng )不(bú )能(néng )同(tóng )时(shí )作(zuò )出(chū )两(liǎng )个(gè )矛(máo )盾(dùn )的(de )判(pàn )断(duàn )，即(jí )不(bú )能(néng )既(jì )肯(kěn )定(dìng )它(tā )，又(yòu )否(fǒu )定(dìng )它(tā )。如(rú )不(bú )能(néng )既(jì )说(shuō )“水(shuǐ )是(shì )物(wù )质(zhì )”，同(tóng )时(shí )又(yòu )说(shuō )“水(shuǐ )不(bú )是(shì )物(wù )质(zhì )”。这(zhè )两(liǎng )个(gè )判(pàn )断(duàn )中(zhōng )必(bì )有(yǒu )一(yī )个(gè )是(shì )假(jiǎ )的(de )。遵(zūn )守(shǒu )矛(máo )盾(dùn )律(lǜ )能(néng )使(shǐ )思(sī )维(wéi )具(jù )有(yǒu )一(yī )贯(guàn )性(xìng )和(hé )不(bú )矛(máo )盾(dùn )性(xìng )；否(fǒu )则(zé )，就(jiù )会(huì )犯(fàn )“自(zì )相(xiàng )矛(máo )盾(dùn )”的(de )逻(luó )辑(jí )错(cuò )误(wù )。故(gù )矛(máo )盾(dùn )律(lǜ )的(de )公(gōng )式(shì )是(shì )：“甲(jiǎ )不(bú )是(shì )非(fēi )甲(jiǎ )”或(huò )“甲(jiǎ )不(bú )能(néng )既(jì )是(shì )乙(yǐ )又(yòu )不(bú )是(shì )乙(yǐ )”。

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●矛盾律（简体版）