[onedoug]

I'm just wondering where this rabbi decrees this a matter of Halacha, if it isn't Biblical or Talmudic. If he doesn't have a source, it's just his opinion, and he shouldn't be stating it as a matter of Jewish law.

[GSlob]

I doubt the rules on chewing gum could be directly inferred from any religious text, since all these pre-date the introduction of the chewing gum, and thus do not deal with the subject. So, any interpretation from old texts would have to be strained, to say the least.