Define life

Just wondering about /sci/'s definition of life. None of that made of cells bullcrap. Bonus points for answers which adequately handle fire, viruses, corporations, and artificial intelligence.

Best answer will recieve a box containing a simulation of a universe whose denizens are just on the verge of discovering that their world is a simulation.

This won't make any sense to anyone, but my personal belief is that all things present are alive, but through choices changes take place and transform the complex structures into mutations of succession. I understand that this isn't proof, it is just my humble opinion and only worth a lot to myself at the present time. Perhaps that too may change some day. :)