Which of the following is false?

  • A
    $p \vee \sim p$ is a tautology.
  • B
    $\sim (\sim p) \Leftrightarrow p$ is a tautology.
  • C
    $p \wedge \sim p$ is a contradiction.
  • D
    $((p \wedge p)$ $\rightarrow q)$ $\rightarrow p$ is a tautology.

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