Except for "her" (which can be a possessive pronoun OR simply the second person feminine pronoun,) each word you list is already always a possessive pronoun. Adding "s" does not signify their (already unambiguously established) possessive nature, but that they do not refer to the word immediately following them (e.g. "your car" but not "yours car," rather, "that car is yours.") That is closer to true genitive declension than the makeshift relic apostrophe+"s" represents. I cannot recall ever seeing "its" used in that way; "it" is analogous to "my" not "mine." I (and almost certainly you) would say, for example, "the governments power to print money belongs to it," not "the governments power to print money is its."


In the interest of full disclosure, before moondog joined wotmania he introduced me to xkcd with "Duty Calls" to illustrate his impression of my wotmania posting habits. Around that same time someone posted a wotmania thread about the Flame Warriors site, and you can probably understand why I felt this entry hit a little close to home. ' /> Beyond that I can only reiterate one of my Pithy Pet Phrases: Few things are difficult; many are complicated.