"If we can sell our old house, then we will have enough money to buy a new one. We're rich, so we do have enough money to buy a new one. Therefore, we'll be able to sell our old house." Choose the best symbolization of the statement and evaluate its validity.
A. s ? m, r & (r ? m), ? s; this argument is invalid
B. s ? m, r ? m, ? s; this argument is invalid
C. s ? m, r & (r ? m), ? s; this argument is valid
D. s ? m, r ? m, ? s; this argument is valid
E. None of the answers are correct
Answer: A
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