Hobbes' Choice wrote:
I see what you mean. But I feel that causality has to be temporally directional. I can't bang the nail in until I have made the hammer.
I saw a good explanation of this by I believe Brian Greene in a documentary explaining a secondary use of the law of thermodynamics. He demonstrated a glass being dropped to the floor and broken into flying pieces everywhere to which he asked if the reverse is possible? He answered yes by showing the arrows of each fragment in the forward direction in time, then simply reversed each arrow (through CG effects). He explained that while it would be highly unusual, the reality is that if all the forces were reversed precisely, the glass would exactly form as a whole again. It is only about the odds of this that limit the likelihood only. So to him, he too agrees that time is invariably bidirectional.
The other Greene (from England?) takes the same view as you and Leo on this though. So differences of opinion is variable by many physicists alike too. The 'reversal' of a hammer hitting a nail is the idea that the energy of the dispersion of the nail could technically cause the nail to inversely cause a hammer that is on its head to fly backwards in the exact opposing way of the initial hammer.
Also, in experiments on consciousness, they also demonstrated that our interpretation of the sense is 'backwards' in that we only consciously recognize our thought after our predetermination to act. I argued this rationale independently in a different way but like the fact that there is support for this. My own explanation is that we are 'conscious' simultaneously upon all active neurons feeling it, even in different places in the brain, but only 'confirm' this where the energy of these meet in some common link. Thus we 'feel' instantly yet somewhat 'forget' any non-linked energy exchanges between neurons. This is a proof of the idea of another 'effect' that interprets the 'cause' akin to evolution.
The apparent problem expressed here in evolutionary theory is more than a virtue of perspective. I feel it is a fundamental error that biology has inherited from a thousands' of years legacy of an assumption of a purposeful universe mostly guided by divine forces. In this most humans tend to see the world in terms of its utility and tend to think of objects in it having a purpose. This teleology reaches deep into interpretations of biological mechanics of change. Elsewhere on this Forum I have described this problem recently.
I still think there is some milage in your idea of causes being effects but only in descriptions that are synchronic. This can have some useful applications, but at the end of the day (excuse the pun), reality is diachronic.
I am confused by your interpreted uses of these. I used "bidirectional" when you say that "reality is diachronic" in apparent contradiction to how I interpret the word I use as the same as yours. You seem to be saying (in my interpretation) that time is unidirectional (synchronic? or at least non-diachronic) but then affirm it being diachronic anyways. Just asking for more clarification or definitions only.