In article <W7Lok.19952$uE5.19027@flpi144.ffdc.sbc.com>,
 John Harshman <jharshman.diespamdie@pacbell.net> wrote:

Who says water is an indicator of life? It's only claimed to be 
necessary for life. Methane, as far as I know, is never mentioned. 
Oxygen is the indicator of life, and if you want to suggest an inorganic 
process that can make a lot of free oxygen in an atmosphere, feel free.

Only oxygen? 

Yeah... it's common and it does some handy chemical reactions. But 
similar arguments can be made for water.

-- 
Timberwoof <me at timberwoof dot com> http://www.timberwoof.com
People who can't spell get kicked out of Hogwarts.