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11. Knowledge Aims / C. Knowing Reality / 1. Perceptual Realism / c. Representative realism

[we know reality via mental representations]

9 ideas
Whether honey is essentially sweet may be doubted, as it is a matter of judgement rather than appearance [Sext.Empiricus]
     Full Idea: Honey appears to sceptics to be sweet, but whether it is also sweet in its essence is for us a matter of doubt, since this is not an appearance but a judgement.
     From: Sextus Empiricus (Outlines of Pyrrhonism [c.180], I.20)
Hume says objects are not a construction, but an imaginative leap [Hume, by Robinson,H]
     Full Idea: Hume's idea is that we move from private impressions to the physical world, not by an unconscious analytical construction but by a spontaneous imaginative leap.
     From: report of David Hume (Treatise of Human Nature [1739]) by Howard Robinson - Perception IX.6
     A reaction: The idea that objects are 'constructions' seems to have originated with Russell. Hume seems closer to the actual process, which is virtually instantaneous. They both forget that you can follow up the construction or leap with a cool evaluation.
Science condemns sense-data and accepts matter, but a logical construction must link them [Russell]
     Full Idea: Men of science condemn immediate data as 'merely subjective', while maintaining the truths of physics from those data. ...The only justification possible for this must be one which exhibits matter as a logical construction from sense-data.
     From: Bertrand Russell (Our Knowledge of the External World [1914], 4)
     A reaction: Since we blatantly aren't doing logic when we stare out of the window, this aspires to finding something like the 'logical form' of perception.
Russell (1912) said phenomena only resemble reality in abstract structure [Russell, by Robinson,H]
     Full Idea: Russell held in 'Problems of Philosophy' that the physical world resembles the phenomenal only in abstract structure.
     From: report of Bertrand Russell (Problems of Philosophy [1912]) by Howard Robinson - Perception VII.5
     A reaction: Russell's problem is that he then requires full-blown and elaborate 'inferences' to get from the abstract structure to some sort of 'theory' of reality, but our experience seems much more direct, even if it isn't actually 'naïve'.
There is no reason to think that objects have colours [Russell]
     Full Idea: It is quite gratuitous to suppose that physical objects have colours.
     From: Bertrand Russell (Problems of Philosophy [1912], Ch. 3)
     A reaction: This has always seemed to me self-evident, from the day I started to study philosophy. I cannot make sense of serious attempts to defend direct (naïve) realism. Colour is a brilliant trick of natural selection for extracting environmental information.
Indirect realism depends on introspection, the time-lag, illusions, and neuroscience [Dancy,J, by PG]
     Full Idea: The four standard reasons for preferring indirect to direct realism are introspection of our mental processes, the time-lag argument, the argument from illusion, and the findings of neuroscience.
     From: report of Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.4) by PG - Db (ideas)
     A reaction: Ultimately one's views about realism depend on one's views of the mind/brain, and it is the last of the four reasons that sways me. We know enough about the complexity of the brain to accept that it represents reality, with no additional ontology.
Internal realism holds that we perceive physical objects via mental objects [Dancy,J]
     Full Idea: Indirect realism holds that in perception we are indirectly aware of the physical objects around us in virtue of a direct awareness of internal, non-physical objects.
     From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.4)
     A reaction: This may be a slightly prejudicial definition which invites insoluble questions about the ontological status of the internal 'objects'. It seems to me obvious that we create some sort of inner 'models' or constructions in the process of perception.
Representative realists believe that laws of phenomena will apply to the physical world [Robinson,H]
     Full Idea: One thing which is meant by saying that the phenomenal world represents or resembles the transcendental physical world is that the scientific laws devised to apply to the former, if correct, also apply (at least approximately) to the latter.
     From: Howard Robinson (Perception [1994], IX.3)
     A reaction: This is not, of course, an argument, or a claim which can be easily substantiated, but it does seem to be a nice statement of a central article of faith for representative realists. The laws of the phenomenal world are the only ones we are going to get.
Representative realists believe some properties of sense-data are shared by the objects themselves [Robinson,H]
     Full Idea: A representative realist believes that at least some of the properties that are ostensively demonstrable in virtue of being exemplified in sense-data are of the same kind as some of those exemplified in physical objects.
     From: Howard Robinson (Perception [1994], VII.5)
     A reaction: It is hard to pin down exactly what is being claimed here. Locke's primary qualities will obviously qualify, but could properties be 'exemplified' in sense-data without them actually being the same as those of the objects?