Alternative Models of Reality

A response to Tim Maudlin's desparaging remarks about Kant on YouTube and questioning the necessity of apriori material existence as Einstein's special relativity asks for. I reiterate what
I said on the George Ellis Existence thread. This maybe a better place for that.

Kant was on to something .He realises the need for an obsever independent material existence as well as what we are aware of, our relative perception, but doesn't really explain why this is neccessary.
The necessity of apriori material existence before observer involvement Georgina Woodward
Human beings do not see material things /objects-themselves. They see liknesses ( observation products also called Image realities) which are formed from the reciept and processing of sensory data obtained at that particular place, at that time, by that observer. What is seen corresponds to the brain activity that is stimulated .In particular the visual cortex where the image is identified and parts of the brain where associated memory and learning is located. The sensory data that is used to provide vision is photon particles ,released by material objects into the environment and carried by waves though it. Only when processed, is the likeness seen. it corresponds to the object when the sesnsory data was released not when recieved by an obsever. Thus it is seen as it was not neccesarily as it is now/ has become. In order to shed sensory data an object must necessarily exist as such.

Georgina Woodward
Absolute simultaneity, the preffered foliation of time, a-Now comes from the seqential change of all physical reality, becoming by recycling, reuse and change rather than replication.
Relativity comes from how we experIence the environment, via sensory stimulus reciept and processing. The sensory data is affected by absolute change of physical reality but when it is recieved also matters.

Georgina Woodward
Response to 1st half of video.
Maudlin supports the idea that there has tobe a direction of time despite it being time reversaible, This is what gives us before and after, cause and effect.

Georgina Woodward
Continued- He says that Newton thought their was a direction of time and Newtonian physics has a foliation or slicing of space and time that is global, an event affecting the whole world and universe at once.
T. Maudlin says that in his opinion a return to a singular absolute global/universal foliation is needed by modern physics.
Einstein's relativity, SR and GR completely 'did away with' foliation of time and a singular Now.
T. Maudlin argues that Einstein still thinks there is passage of time, proper time with a direction globally. He argues that Subjectively individual obsevers may disagree, their individual, only local viewpoint is irrelevant to the universal process of evolution accoss time, 'globally'.

Georgina Woodward
About past, present, and future having the same equally valid status in Relativitry. A. Erlitzer says that there is intuitively something special about Now . Even though Mudlin sets out the argument that past, present and future must exist in order for different contadictory slicing or the passage of time to happen as It does according to SR. He does not however take this further by saying it which way the 'events' persist, presumably imagined as being the material 3D reality that has been supeseeded set out along the time dimension. An existing realm, as real as the present, (that might be visited by a time traveller.) I don't agree with this ,as information released at the time of an event can persist in the environment and be recieved later as sensory input.
So the process of passage of time (recycling and reuse of the material part of the universe ) continues and with it universal becomming.

The quantum of vision, visual stimulation, is te photon particle. These are shed into the external enviroment by matter, abd absorbed from it by matter. If the matter is a phiotireceotor cell, containg a photoresponsive pigment, a particular wavelength of input vibrational energy will stimulate a response. Different cells respond to different wavelengths.

Georgina Woodward
This is not a particle wave as described by the wave function of quantum mechanics but an actual particle produced by the matter atom and interacting with the already present (non matter ) filled environment. This allows there to be a viable alternative explanation of the double-slit experiment.

A photon particle, quantum of vision, provides the wavelength of visible light that a phoreceptor cell is able to respond to via interaction with the pigment contained by the cell. Or it can activate a photocell belonging to a device such as a ditgital camera or robot. OR cause reaction in a light sesitive film of a film camera. Photons also give relative position information , of the many photons input -after passing through a suitable lens. The relative position of parts of the source object, when the photons were shed is knowable from this. The multiples of photons arriving at a photoreceptor gives total energy or intensity (brightness) information. The various inputs , suitable quantum , position, intensity are used in processing that eventually leads onto subject recognition process and image/semblance formed. Often along with associations, such as name , memories and learning connected with the source object identified. Wavelength is converted to Colour product if its a bright light adaption cone cell that's stimulated, lower intensity input is insufficient to stimulate a cone cells but can stimulate monochrome rod cells.

Georgina Woodward
Re. measurement problem,
see my post a month ago in George Ellis on Existene thread.

We need a correct understanding of passage of time, including why two dimensions that relate to it are needed, in order to include what we see there, as well as material existence.
Also we need to be using the correct number of spatial dimensions that apply to the real material World / Universe, existing -Now. and vision, Treating block time as history of the material world, that isn’t extant laid out along an imagined time line.
Correct or better understanding of photons and how light is transmitted together with self similarity of nature at different scales, Using the corrections together with relativity. To have both what occurs unseen and products of vision as parts of physics. Both important but not the same.

Gravity Two models are needed as the background for each is different.

1.Einstein /Minkowski curved space-time fabric corresponds to what we see, by the process of vision. It is a perdurant model in which matter bodies / objects and background are spread over time due to vision being possible because of photon particles being transmitted and the photon particles being delayed by gravity, affecting time of receipt.

The other model pertains to actual matter, existing wholly-Now. That can’t be seen. We see 1. This is an endurant model. Objects and background exist wholly at -Now. Their existing is not spread over time. Here we can use Newtonian gravity,which doesn’t take notice of time. matter with gravity affects other matter atracting it and particles if matter in the environment, non matter-bound particles in the environment (plasma) and other space filling substance, through which light is transmitted. In this model rather than having a constant speed of light assuming the vacuum of apace to be everywhere a vacuum,. objects of matter are affected by the density of what they pass through, the more dense the more light slows and bends casing refraction.
Space that we think of as empty may not be. It may contain matter, or non matter-bound particles or gravitationally significant other unseen substance. This could be the elusive dark matter ,which is hypothesized to exist but is absent from most models.