Geoff, do you think, that if you close your eyes while conducting the double-slit experiment with the detectors placed on both slits, then the wave function does not collapse on one of them?
If there is no causal connection between any consciousness (not just mine) and whatever is happening in the physical world, including any version of the double-slit experiment, then the entire thing remains in phase 1 superposition. That doesn't rule out mathematical decoherence -- maybe the wave function can split into more than one part, such that whenever they are eventually observed by consciousness then this split is necessarily incorporated into the outcome -- but there is no actual collapse - no
timeline selection - until consciousness is involved.
You appear to think that if you keep giving me more examples of this then I will somehow "get confused" or suddenly realise this makes no intuitive sense...but that just demonstrates that you don't understand what this looks like from my perspective. I am acutely aware of the implications of what I am saying. These aren't just empty words or half-baked ideas. I mean
exactly what I am saying. What you think of as "the physical world" is a critically unexamined mixture of "the physical world as we experience it" and "the physical world as it is in itself, independent of our experiences of it". For me, these things have been very clearly separated since I rejected materialism at the age of 33 (I am now 56). In the intervening years I have both studied philosophy academically, and spent 17 years (4 attempts) writing a book about this.
Now, given all that, do you really think you can prompt me to completely revise my current views based on the most basic questions about the double slit experiment? Do you seriously think I am still operating at that conceptual level? For me, that way of thinking is
ancient history.