No nonprescription drugs are medicines without adverse effects. Therefore, no medicines with adverse effects are prescription drugs.

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No nonprescription drugs are medicines without adverse effects.
Therefore, no medicines with adverse effects are prescription drugs.

Use conversion, obversion, and contraposition to determine whether the following arguments are valid or invalid. For those that are invalid, name the fallacy committed.

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A Concise Introduction to Logic

ISBN: 978-1305958098

13th edition

Authors: Patrick J. Hurley, Lori Watson

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