This is Propositional Logic. I just need to fill in the steps. Most obviously, if I can infer R -> S, I have a hypothetical syllogism, but I can't see how to infer R -> S. And nothing else I've tried works.(adsbygoogle = window.adsbygoogle || []).push({});

1. Q -> (R -> S) Premise

2. Q -> R Premise

3.

4.

5. Q -> S Conclusion

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# Stumped on a deduction problem

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