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Accepting the following premises: ( p ∧ t ) → ( r ∨ s ) q...

Accepting the following premises:

  1. ( p ∧ t ) → ( r ∨ s )
  2. q ⟶ ( u ∧ t )
  3. u ⟶ p
  4. ¬ s

Show that q → r .

If you are able to explain some of the thought process behind the problem, that would be amazing. Thanks

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