Multiple Access = Strong "Cascade" Memories (Score 1)

Theoretically the limit to human memory is within 3 weeks of conception when the neural plate has formed and the first neurological pathways begin to form (interestingly the brain stem is the first recognizable organ that forms). Everything which our brain processes is processed along pathways which are formed by the neurons. Paths that are regularly used are strengthened and those that are not die off. It is this establishment and strengthening/weakening of pathways which forms our memories. Therefore memory is the only factor which governs the way in which we process the information which we glean from the world. The full-duplex hi-fidelity memory you are talking about is in fact a memory "cascade" triggered by a thought cascade. Usually these pathways are formed close together and therefore the cascade can happen quite easily and with little effort. Or with the longer term "cascades" you have either knowingly or unknowingly "through the process of dreaming" evoked a hi-fi memory cascade regularly and thus are able to recall them easily. The longer you leave a cascade "unchecked" the more neighboring neurons will be able to take hold of an under utilized neuron and a pathway will shrivel up, that part of your cascade will fade with it and parts of the cascade will remain and will have an influence on your day to day living whether you know it or not.

I could go on all day about this but I think I will stop here.