[theli0nheart]

> Because there is zero proof that species will get past the point where they can start moving between the stars.

The feasibility of interstellar space travel is an unknown unknown. We have so much more to understand about our universe and our world before we can even cast doubt on whether it's possible or not. When we don't even know what 85% of the universe consists of, much less lack a unified field theory, we just don't yet have the knowledge to make bold assertions on this topic.

[jacquesm]

Yes, that is yet another assumption. In general any conversation about such stuff should start out with stating clearly what your assumptions are. Since the GGGP started out with interstellar travel as assumed I felt no need to fix that (and technically, voyager qualifies as an interstellar spacecraft at this point in time, even if it is an unmanned one). But you are 100% right, interstellar travel by intelligent beings should definitely not be assumed until there is proof of it actually happening and/or being done.

Even Musk's 'Starship' is incorrectly named.

[theli0nheart]

Fair :)