The main assumption, imho, is that if we input very large capabilities, we will get very large achievements. That is, if we we assume possibility of superintelligence and nanotech, we will get a possibility of quick intergalactic travel.
However, arguing from infinities could be problematic, as it could produce contradicting results, as is well known in the philosophy: https://en.wikipedia.org/wiki/Omnipotence_paradox
The main assumption, imho, is that if we input very large capabilities, we will get very large achievements. That is, if we we assume possibility of superintelligence and nanotech, we will get a possibility of quick intergalactic travel.
However, arguing from infinities could be problematic, as it could produce contradicting results, as is well known in the philosophy: https://en.wikipedia.org/wiki/Omnipotence_paradox