Maggie
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Posts posted by Maggie
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If I is false then the second premise (F ∨ G) → (I ∧ J) must be false because I and J both have to be true for (F ∨ G) to be true?
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Ok...so I need to assume and get a contradiction?
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Ohh...if ¬K is false that means I ↔ ¬K is false because I if only if ¬K.
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¬K is false...?
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We know that K and ¬K is a contradiction?
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I'm sorry, the program is called Fitch.
And my problem is I do not know how to start a proof...I don't know what subproof does. If I was asked to write the proof out on a piece of paper I would have no idea how. Using the program helps to check my steps as you can see above. However I just don't understand the proof process. And yes, I don't see how to work from K to H...
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How to start a formal proof in symbolic logic?
in Homework Help
Posted
Ok...I am not quite sure where I'm going with this...Could you be more specific?