Video: Puas yog cov lus tsis sib thooj muaj tseeb?
2024 Tus sau: Edward Hancock | [email protected]. Kawg hloov kho: 2023-12-16 01:32
Yog tias nqe lus yog muaj tseeb , ces tus contrapositive kuj logically muaj tseeb . Yog hais tias tus converse yog muaj tseeb , tiam thim rov qab kuj yog logically muaj tseeb.
Piv txwv 1:
| Nqe lus | Yog tias ob lub kaum sab xis sib haum, ces lawv muaj qhov ntsuas tib yam. |
|---|---|
| Rov qab | Yog tias ob lub kaum sab xis tsis sib haum, ces lawv tsis muaj qhov ntsuas tib yam. |
Tom qab ntawd, puas yog qhov hloov pauv ntawm nqe lus ib txwm muaj tseeb?
Cov thim rov qab tsis yog muaj tseeb jest vim lub conditional yog muaj tseeb . Cov inverse ib txwm muaj qhov tseeb tus nqi ib yam li tus converse. Yog lub conditional yog muaj tseeb ces tus contrapositive yog muaj tseeb . Ib tug qauv ntawm reaoning yog ib muaj tseeb kev xav yog tias nws ib txwm coj mus rau ib muaj tseeb xaus.
Tsis tas li ntawd, ib nqe lus thiab nws qhov kev tsis pom zoo tuaj yeem yog qhov cuav? Qee zaum hauv lej nws tseem ceeb heev kom txiav txim siab dab tsi tus opposite ntawm ib tug muab lej nqe lus yog. Qhov no feem ntau yog hu ua " negating "a nqe lus . Ib yam uas yuav tsum nco ntsoov yog tias a nqe lus yog muaj tseeb, ces nws negation yog cuav (thiab yog tias a nqe lus yog cuav , ces nws negation yog muaj tseeb).
Yog li ntawd, dab tsi yog qhov inverse ntawm nqe lus?
Rov qab ntawm ib tug Conditional. Negating ob lub hypothesis thiab xaus ntawm ib tug conditional nqe lus . Piv txwv li, lub thim rov qab ntawm "Yog los nag ces nyom ntub" yog "Yog tsis los nag ces nyom tsis ntub". Nco tseg: Raws li nyob rau hauv qhov piv txwv, ib qho kev tawm tswv yim yuav muaj tseeb tab sis nws thim rov qab tej zaum yuav tsis muaj tseeb.
Dab tsi yog Contrapositive ntawm P → Q?
Contrapositive ntawm a nqe lus hais ntawm daim ntawv "Yog p ces q" yog "Yog ~q ces ~p". Symbolically, lub contrapositive ntawm p q yog ~ q ~ p. A nqe lus hais yog logically sib npaug rau nws contrapositive.
Pom zoo:
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