Philosophy
The Difference Between Validity and Soundness in Arguments
Quick fact
A valid argument can have false premises and a false conclusion, yet still be logically correct. For example: 'All birds can swim. Penguins are birds. Therefore, penguins can swim.' This is valid, but the first premise is false.
Why this is interesting
You've probably heard someone say an argument is 'valid,' but is a valid argument always a good argument? Actually, a valid argument can be completely untrue.