torekp comments on A few analogies to illustrate key rationality points - Less Wrong
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It isn't just a linguistic trick: it is pointing out that there exist ways in which a dimension can end, even if the particular way is nothing like the other.
Are there any relativistic space-time geometries which would have the beginning of time broadly resembling one pole of a hypersphere? Just wondering how far the analogy could be pushed.
Yup.