Ought, is, and logic

Footnotes to Plato

Kant young Immanuel Kant

Last month I published an essay on alleged empirical evidence that Kant’s idea that ought implies can (OIC) is false. To refresh your mind, the paper I discussed was published by Vladimir Chituc and co-workers, who claimed that — because a good number of random folks say that someone ought to do X when it is plain impossible for X to actually be carried out — then Kant’s famous dictum from the Critique of Pure Reason: “The action to which the ‘ought’ applies must indeed be possible under natural conditions,” must be wrong. I suggested instead that the folks used as subjects by Chituc and colleagues simply didn’t understand basic logic. An epic Twitter battle ensued.

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