a0. The pivotal fine tuning beneath

    !! Gemini claims that the absence of a speed limit ‘would likely result in a "causal soup"
      where no stable structure could ever form’ in the first place, thus a lifeless cosmos
        : see https://gemini.google.com/app/66a05730b0178d25
        ? Among scholars who debate the universe’s fine-tuning for life, has any argued that life
           depends on a universal speed limit, whether on the presence of such a limit,
           or on its particular value (at 3×10⁸ m/s)?
            ! consensus on both counts: already it’s considered part of the fine-tuning for basic life,
               viz. its creation and stability on the short scale of time
                : see https://gemini.google.com/app/a15855dddec6eca0
        surprise+ still the following surprises me
            • that a speed limit so obviously crucial to intelligent life in long-term cosmic time
              is (surprise!) crucial also to basic life in short-term geo-evolutionary time,
              making the latter surprisingly sensitive to it
                / the need isn’t so obvious in the latter case
        explanation+ mitigating the surprise by way of
            | a speed limit is necessary to long-term tuning, but dispensible for short-term tuning
                : privately see notepad:2026-5-10
                - the otherwise surprising sensitivity of the short-term tuning to the speed limit
                  can be explained thus:
                    • the short-term tuning is part of a long-term tuning
                        - creation and survival of basic life over the short term is, after all,
                          necessary to the survival of intelligent life over the long term
                            - one cannot have the latter without the former
                            ∴ tuning for the former is proper to the latter
                        ∴ the presence of long-term tuning suffices in itself to explain
                          what otherwise would be surprising
                - further still, on all cosmic properties taken together
                    - the argument appears able to bear their weight
                        ∵ hard to conceive a different (let alone better) long-term tuning
                            ∵ hard to conceive that any of these properties could be dispensed with
                        ∵ easy to conceive a different (maybe even a better) short-term tuning
                            : re `maybe even.+better` see e.g.
                              https://plato.stanford.edu/entries/fine-tuning/#CondRealFineTuneForLife :
                             ‘If Adams is right, our universe may just be garden-variety habitable
                              rather than maximally life-supporting.’
            | the tuning for life’s long-term survival is (somehow) more basic
                - it is (in some sense) prior to the short-term tuning (for creation and stability)
                ∴ the short-term tuning {builds|is built} *on top* of and/or *around* the long-term
                ∴ the short-term tuning is made sensitive to (changes in) that of the long-term
                    - minor changes in the basic, prior long-term tuning on/around which
                      the short is built are likely to de-stabilize the short
                ∴ the short-term tuning’s sensitivity to the speed limit (to its presence
                  and particular value) is a mere artifact of the long-term tuning
                • the tuning is effected by tuning mechanism or mode
                  that is (somehow) directed toward life’s long-term survival
                    • the tuning is effected by a designer
                      who purposes the long-term survival of [intelligent] life’s
                        / viz. not by multiverse theory, nor by an observer selection effect