For RR:
Valid arguments don't necessarily have true or plausible premises. What makes an argument valid is if the truth of the premises guarantees the truth of the conclusion, regardless of whether the premises are plausibly true or not.
Sound arguments are valid arguments that have plausibly true premises.
Valid arguments don't necessarily have true or plausible premises. What makes an argument valid is if the truth of the premises guarantees the truth of the conclusion, regardless of whether the premises are plausibly true or not.
Sound arguments are valid arguments that have plausibly true premises.