display all the ideas for this combination of texts
7 ideas
| 2780 | Perception is either direct realism, indirect realism, or phenomenalism [Dancy,J] |
| Full Idea: There are three main families of theories of perception: direct realism, indirect realism, and phenomenalism. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.2) |
| 5679 | We can't grasp the separation of quality types, or what a primary-quality world would be like [Dancy,J] |
| Full Idea: There is doubt about whether our experience of the world is such that we can conceive of the sort of separation of primary and secondary qualities which the scientific view calls for, and can understand what the world is like with no secondary qualities. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.3) | |
| A reaction: Dancy attributes these doubts to Berkeley (e.g. Idea 3837). I think what is claimed here is false. Obviously we spend our whole lives immersed in secondary qualities, but separating the different aspects is precisely what scientists (and philosophers) do. |
| 5680 | For direct realists the secondary and primary qualities seem equally direct [Dancy,J] |
| Full Idea: For a direct realist our awareness of colour and heat can hardly be of a different order from our awareness of shape and size. Both sorts of properties are presented with equal directness. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.3) | |
| A reaction: This is a good objection to 'direct scientific realism', which claims direct apprehension of primary qualities alongside a totally relative view of secondary qualities. The best response seems to be to move to a representative view of primary properties. |
| 2782 | We can be looking at distant stars which no longer actually exist [Dancy,J] |
| Full Idea: An object such as a distant star can have ceased to exist by the moment at which we are directly aware of it. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 10.2) |
| 2775 | It is not clear from the nature of sense data whether we should accept them as facts [Dancy,J] |
| Full Idea: The question whether something which appears as datum should remain as accepted fact is one which is not even partially determined by its origin as datum. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 8.5) |
| 2784 | Appearances don't guarantee reality, unless the appearance is actually caused by the reality [Dancy,J] |
| Full Idea: If I stare at a white wall with my brain wired to a virtual reality computer, and it generates a white wall, we wouldn't say I am seeing reality. It seems that the wall itself must in some way cause my perception of it. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 11.4) | |
| A reaction: But suppose the computer generated in my mind an image of the wall which was actually in front of me? And suppose the computer got its image from the identical wall next door, not from mine? And it was only judged identical because the architect said so |
| 2785 | Perceptual beliefs may be directly caused, but generalisations can't be [Dancy,J] |
| Full Idea: A perceptual belief that p can have as its main cause the fact that p. More general facts (all men are mortal; e=mc2) cannot be the main cause of my belief, even if they do function causally in some way. | |
| From: Jonathan Dancy (Intro to Contemporary Epistemology [1985], 11.5) | |
| A reaction: Note that the perceptual belief can be the "main" cause; it seems to me that most beliefs are caused by judgements, though I may normally accept beliefs which are directly caused by perception, if I have no reason to challenge them. |