... for the stimulus to be valid, we need to assume an ... to make (C) valid. (C) is already valid by itself. This is ... , the argument in (C) is valid. Thus, (C) cannot be parallel ...
... -Q3 is no longer a valid placement of the variables, leaving ... us with 1 valid way to have an S ... that we cannot have a valid world in which Q3 and ...
... a conditional statement. It's valid, but its soundness is questionable ... />
This misuses of both "valid" and "sound". Valid sentences are logical truths ... truth, and thus is not valid. Soundness applies to arguments, not ...