In the media, kung saan has become a definite adverbial phrase, the opposite of what it is. The speaker knows precisely where, when and how many.
Question: If the speaker knows precisely where, when, and how many, why use the conditional kung?
This is where we recommend the definite, self-confident, fat-free, no-frills na. See how self-effacing it is? You almost missed it at the end of that sentence!
read more here:
http://newsinfo.inquirer.net/454919/where-oh-where-did-kung-saan-come-from