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Finding nonclassical counterexamples

Here is a random argument! (Premises above the line; conclusion below it)

  • ¬⊥ ∧ j
  • (⊥ ∧ ⊥) ∨ j
  • ---------------
  • (t ∧ (n ∨ p)) ∨ r

Give a counterexample to this argument in the LP matrix, if there is one!

Note that the matrix can change from one argument to the next, so stay alert!

j

n

p

r

t