This is how it is with items of evidence: If both B and C are evidence for A, the conjunction of B and C is (typically) stronger evidence than B or C alone.6 Put in terms of arguments, the argument with B and C as premises is more forceful than either the argument with B as a premise

6 This holds so C occurs, and vice

long as B and C are independent: whether or not B occurs has no bearing on whether or not versa. Otherwise the situation is more complicated.

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