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A lesson in logic

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I saw this gun control meme the other day. We shall call it the “kid on the playground” argument. It’s meant to be a rebuttal of the gun rights argument, “Only a good guy with a gun can stop a bad guy with a gun.” What do you think? Is it a valid rebuttal? The “kid on the playground argument” is an argument from analogy, comparing one situation to another. But it fails in a number of ways. An argument from analogy is only effective if the two things being compared are similar in their most essential points. But this is not the case with the “kid on the playground” argument and the “good guy with a gun” argument. First, a kid on the playground throwing rocks is not very similar to a man firing a gun in terms of their effects . We’re comparing cuts and bruises to lethal wounds. This is a fatal flaw in the analogy. But there is more. In the “good guy with a gun” argument, there is no one analogous to the teacher in the “kid on the playground” argument. There is no one who g...

"Why don't they teach logic at these schools?"

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“Logic!” said the Professor half to himself. “Why don’t they teach logic at these schools?” - C. S. Lewis, The Lion, the Witch and the Wardrobe - I recently came across this picture, which seems to be making the rounds on social media in one form or another. What do you suppose is its purpose, its intended meaning? What conclusion does its creator wish us to draw? Is it simply that blacks, whites, gays, straights, religious people, and atheists all have the same basic skeletal structure? This is true enough, of course, but also so obvious as to scarcely need pointing out. So what is its meaning? Given the social and political climate of the day, it seems to be this:  that blacks, whites, gays, straights, religious people, and atheists are all morally equivalent. The picture contains an argument that might be expressed in the following syllogism: People who have the same skeletal structure are morally equivalent. Blacks, whites, gays, straights, religious peo...