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jkorb / KI1V13001-Inleiding-Logica

This is the source material for the course "Inleiding Logica" (KI1V13001) as taught at Utrecht University for the BSc "Kunstmatige Intelligentie"
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minor mistake in the solution to 10.8.2d #113

Closed DorusKeijzer closed 2 years ago

DorusKeijzer commented 2 years ago

10.8.2 d asks you to make a tableau of the following inference: image

The solution in appendix J starts with this initial list:

image

Shouldn't it start with the negation of the initial formula? Or is this allowed by some black magic with the deduction theorem that I'm not aware of? I can see how it's similar to what the deduction theorem states, but I thought that was more part of the realm of semantics. Anyways, this initial list follows immediately from the negation of the inference so for the final answer it doesn't matter.

jkorb commented 2 years ago

Good point @DorusKeijzer ! Will get fixed :)