Derive the conclusion using rules of inference. A . If Dominic goes to the racetrack, then Helen will be mad. If Ralph plays cards all night, then Carmela will be mad. If either Helen or Carmela gets mad, then Veronica (their attorney) will be notified. Veronica has not heard from either of these two clients. Therefore, Dominic didn't make it to racetracks and Ralph didn’t play cards all night.

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