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each and every philosophical hypotesis we make is somewhat based on human paradygms, structures, and super-structuresUnfortunately, we can't do it any other way, by the very nature of conscious thoughts.
> Why can’t we accept that we populated this world for the equivalent of a cosmic blink, and we are therefore unequipped to even grasp the existence of other life forms?
Why should we? We might be doing a lousy job, but we're doing the best we can.
> At the same time all the examples we make to wrap our heads around these mastodontic concepts are so trivial and so inherently human, that I wonder how can we really take our own musings seriously
It's not like we know of anyone else whose musings we could take more seriously than our own. The known universe, as beautiful and awesome as it is, is also dead.
> will we ever be able to escape the boundaries of our human thought?
If we survive long enough to achieve the ability to re-engineer our minds, I hope so, yes.