zzombie;8609386 said:if there is no official definition then there is no real definition.
There are no official definitions of lots of words;
Here's an example:
There is no official definition of recession, but there is general recognition that the term refers to a period of decline in economic activity.
http://www.imf.org/external/pubs/ft/fandd/2009/03/basics.htm
That doesn't mean that we don't
Understand what
The word refers to.
zzombie;8609386 said:there is no proof that the environmental conditions of the experiment were present on early earth.
There have been variants
And improvements to the original experiment,
and recent research suggests that
Early Earth's atmosphere was even more favorable
Than what was previously thought.
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