"Since the Pegasus, a wide bodied commercial jetliner has been shown to have serious design flaws, it is reasonable to assume that other wide bodied commercial jetliners, such as the Valkyrie, have serious design flaws," is an example of argument from parallel case.

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The argument from parallel case assumes that because one case has a certain characteristic, another similar case will have that same characteristic. In this example, the argument assumes that because one wide bodied commercial jetliner has serious design flaws, all wide bodied commercial jetliners must have serious design flaws.

"Since the Pegasus, a Wide Bodied Commercial Jetliner Has Been