Perhaps, in response to stimuli, people have non-physical inner images {sense-datum, image}. Physical objects cause sense data. Sense data are representations. Mind introspects sense data to perceive colors, shapes, and spatial relations. For example, perceived colors are relations between perceivers and sense data and so are mental objects. However, sense data are mental objects, but brain, objects, and neural events are physical, and non-physical inner images cannot reduce to physical events.
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Date Modified: 2022.0224