Write the following argument in symbolic form. Then either verify the validity of the argument or explain why it is invalid. [Assume here that the universe comprises all adults (18 or over) who are presently residing in the city of Las Cruces (in New Mexico). Two of these individuals are Roxe and Imogene.]
All credit union employees must know COBOL. All credit union employees who write loan applications must know Excel. Roxe works for the credit union, but she doesn’t know Excel. Imogene knows Excel but doesn’t know COBOL. Therefore Roxe doesn’t write loan applications and Imogene doesn’t work for the credit union.
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