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A researcher discovered that people with higher incidences of physical

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Re: A researcher discovered that people with higher incidences of physical [#permalink]
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Simple rule:

If P, then Q implies ~Q --> ~P

And ~P--> ~Q is always incorrect.

Option A is incorrect for the same reasons and option D is correct as per the rule.
Re: A researcher discovered that people with higher incidences of physical [#permalink]
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