MeeGo + LiMo = Tizen

I would read the "not MeeGo + LiMo" part of that claim as saying that Tizen won't be based on MeeGo or LPS, which is not in fact the case according to the linked article. Although the linked article does say that HTML5 will be more part of Tizen than either MeeGo or LiMo, the article does say that it will be based on both MeeGo and LPS, with the proportion initially varying according to target form factor.