This article appears to me to failing in being entirely cogent; his example of the if that returns a number or a string seems nonsensical, and therefore "bad" b

This article appears to me to failing in being entirely cogent; his example of the if that returns a number or a string seems nonsensical, and therefore "bad" by some definitions, which also points out that bad is subjective. That being said, perhaps it would have been a better article if the author presented some arguments of "bad" programs that pass the type system, as type systems are no silver bullet and do not guarantee rejection of all bad programs.