A PS cut from the message sent to freelistst.org: http://www.mercurynews.com/mld/mercurynews/news/breaking_news/8220851.htm "If the [asteroid] had hit the Earth it likely would have _broken up_ in the atmosphere". There's still room for worry: A reasonably-sized_fragment_ of the asteroid can still hit the earth, etc. -- and cause reasonable damage (only that damage cannot analytically be reasonable, right McEvoy?). The paradox now is: if the asteroid does break up, it's no longer, strictly, 'it' that hits the Earth, right? Vis a vis: Grice's conversational maxims, Chesley is not providing as much information as required: "if _a part_ (or piece) of the asteroid had hit the Earth, it entails it (the asteroid) would have broken up (into pieces) in the atmosphere." Etc. Cheers, JL ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html