Cov lus qhia dab tsi yog qhov sib npaug?
Cov lus qhia dab tsi yog qhov sib npaug?

Video: Cov lus qhia dab tsi yog qhov sib npaug?

Video: Cov lus qhia dab tsi yog qhov sib npaug?
Video: Npau Suav li no Txhob coj mus tham qhia luag lwm tus 2024, Kaum ib hlis
Anonim

Cov lus tawm tswv yim sib npaug los yog logically sib npaug yog lawv ib txwm muaj qhov tseeb tus nqi. yog, p thiab q logically sib npaug Yog tias p yog qhov tseeb thaum twg q yog qhov tseeb, thiab rov ua dua, thiab yog tias p yog qhov tseeb thaum twg q tsis tseeb, thiab rov ua dua. Yog p thiab q logically sib npaug , peb sau p = q.

Ib yam li ntawd, koj tuaj yeem nug, qhov sib npaug sib npaug txhais li cas?

Logical Qhov sib npaug tshwm sim thaum ob nqe lus muaj qhov tseeb qhov tseeb. Qhov no txhais tau tias tias ib nqe lus tuaj yeem muaj tseeb hauv nws cov ntsiab lus, thiab nqe lus thib ob kuj tuaj yeem muaj tseeb hauv nws tus kheej cov ntsiab lus, lawv tsuas yog ob qho tib si yuav tsum muaj lub ntsiab lus tib yam.

Ib tug kuj yuav nug, yog Contrapositive logically sib npaug? Tshwj xeeb tshaj yog, cov contrapositive ntawm nqe lus "yog A, ces B" yog "yog tsis B, tsis yog A." Ib nqe lus thiab nws contrapositive yog logically sib npaug , nyob rau hauv lub siab hais tias yog hais tias muaj tseeb, ces nws contrapositive yog muaj tseeb thiab vice versa.

Tib neeg kuj nug, qhov laj thawj sib npaug li cas rau P thiab Q?

Los ntawm txhais, p q ua yog cuav yog tias, thiab tsuas yog tias, nws qhov kev xav, p yog qhov tseeb thiab nws cov lus xaus, q , yog cuav. Lub converse thiab inverse ntawm ib tug conditional nqe lus yog logically sib npaug rau ib leeg, tiam sis tsis yog ob leeg logically sib npaug mus rau cov lus qhia.

Dab tsi yog qhov sib npaug ntawm kev sib npaug hauv lej?

Logical sib npaug yog ib hom kev sib raug zoo ntawm ob nqe lus los yog kab lus hauv propositional logic los yog Boolean algebra. Cov kev sib raug zoo txhais lus ua "yog tias thiab tsuas yog" thiab yog cim los ntawm ob kab, ob lub xub taw rau sab laug thiab sab xis ().

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