(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I've started studying natural deduction recently and I have to prove

(p implies q) or (q implies r)

2. Relevant equations

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3. The attempt at a solution

I thought about using the Law of Excluded Middle, but I'm not sure.

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# Homework Help: Logic: (p implies q) or (q implies r)

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