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Logic  /  Logic 192  ·  Atom · ~20 seconds

Proof Notation

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State

Number every line. Justify every derived line by citing the lines used and the rule applied.

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`4. Q 1, 3, MP` — line 4 is Q, obtained from lines 1 and 3 by modus ponens.

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A line without a justification isn't a proof step; it's a wish.