Lecture 10 - What makes an argument valid? (I) All men are...

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What makes an argument valid? (I) All men are mortal. Socrates is a man. Therefore, Socrates is mortal. All organic molecules contain carbon. This Triglyceride is an organic molecule. Therefore, this Triglyceride contains carbon. All borogroves are mimsy. Jabberwock is a borogrove. Therefore, Jabberwock is mimsy.
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What makes an argument valid? (II) Some women are over 2m tall. Everyone who is over 2m tall is over 1m tall. Therefore, some women are over 1m tall. Some Triglyceride molecules have more than 30 H atoms. Every molecule that has more than 30 H atoms has an O atom. Therefore, some Triglyceride molecules has an O atom. Some seas border three continents. Every body of water that borders three continents is over 50m deep. Therefore, some seas are over 50m deep.
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What makes an argument valid? (III) 1 < 2 2 < 3 Therefore, 1 < 3 -21 < -3 -3 < 0 Therefore, -21 < 0 456 < 78,940 78,940 < 789,200,492 Therefore, 456 < 789,200,492
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What makes an argument valid? (IV)
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Lecture 10 - What makes an argument valid? (I) All men are...

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