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B. For each of the following arguments, a formal proof of validity can be constructed without great difficulty, although some of the proofs may require
B. For each of the following arguments, a formal proof of validity can be constructed without great difficulty, although some of the proofs may require a sequence of eight or nine lines (including premises) for their completion. 1. ABA(CD)BEC 3. (MN)(ON) NMMO *5. (QR)(ST) (UV)(WX) QURV 2. (FG)(HI) JK (FJ)(HL) GK 4. (KL)(MN) (MN)(OP) K O 6. WX (WX)Y(WY)ZWZ
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