A hypothesis that explains the perceptions can be a just-so story. For any set of perceptions ζ, there may be a vast number of hypotheses that explain those perceptions. How do you choose among them?
In other words, if f() and g() both explain ζ equally well, but are incompatible in all sorts of other ways for which you do not have perceptions to distinguish them, ζ may be “evidence for the hypothesis” f and ζ may be “evidence for the hypothesis” g, but ζ offers no help in determining whether f or g is truer. Consider e.g. f is idealism, g is realism, or some other incompatible metaphysical positions that start with our perceptions and speculate from there.
An author I read recently compared this obstinate coherence of our perceptions to a GUI. When I move my mouse pointer to a file, click, and drag that file into another folder, I’m doing something that has predictable results, and that is similar to other actions I’ve performed in the past, and that plays nicely with my intuitions about objects and motion and so forth. But it would be a mistake for me to then extrapolate from this and assume that somewhere on my hard drive or in my computer memory is a “file” which I have “dragged” “into” a “folder”. My perceptions via the interface may have consistency and practical utility, but they are not themselves a reliable guide to the actual state of the world.
Obstinate coherence and persistent similarity of structure are intriguing but they are limited in how much they can explain by themselves.
Dragging files around in a GUI is a familiar action that does known things with known consequences. Somewhere on the hard disc (or SSD, or somewhere in the cloud, etc.) there is indeed a “file” which has indeed been “moved” into a “folder”, and taking off those quotation marks only requires some background knowledge (which in fact I have) of the lower-level things that are going on and which the GUI presents to me through this visual metaphor.
Some explanations work better than others. The idea that there is stuff out there that gives rise to my perceptions, and which I can act on with predictable results, seems to me the obvious explanation that any other contender will have to do a great deal of work to topple from the plinth. The various philosophical arguments over doctrines such as “idealism”, “realism”, and so on are more like a musical recreation (see my other comment) than anything to take seriously as a search for truth. They are hardly the sort of thing that can be right or wrong, and to the extent that they are, they are all wrong.
It sounds like you want to say things like “coherence and persistent similarity of structure in perceptions demonstrates that perceptions are representations of things external to the perceptions themselves” or “the idea that there is stuff out there seems the obvious explanation” or “explanations that work better than others are the best alternatives in the search for truth” and yet you also want to say “pish, philosophy is rubbish; I don’t need to defend an opinion about realism or idealism or any of that nonsense”. In fact what you’re doing isn’t some alternative to philosophy, but a variety of it.
Some philosophy is rubbish. Quite a lot, I believe. And with a statement such as “perceptions are caused by things external to the perceptions themselves”, which I find unremarkable in itself as a prima facie obvious hypothesis to run with, there is a tendency for philosophers to go off the rails immediately by inventing precise definitions of words such as “perceptions”, “are”, and “caused”, and elaborating all manner of quibbles and paradoxes. Hence the whole tedious catalogue of realisms.
Science did not get anywhere by speculating on whether there are four or five elements and arguing about their natures.
A hypothesis that explains the perceptions can be a just-so story. For any set of perceptions ζ, there may be a vast number of hypotheses that explain those perceptions. How do you choose among them?
In other words, if f() and g() both explain ζ equally well, but are incompatible in all sorts of other ways for which you do not have perceptions to distinguish them, ζ may be “evidence for the hypothesis” f and ζ may be “evidence for the hypothesis” g, but ζ offers no help in determining whether f or g is truer. Consider e.g. f is idealism, g is realism, or some other incompatible metaphysical positions that start with our perceptions and speculate from there.
An author I read recently compared this obstinate coherence of our perceptions to a GUI. When I move my mouse pointer to a file, click, and drag that file into another folder, I’m doing something that has predictable results, and that is similar to other actions I’ve performed in the past, and that plays nicely with my intuitions about objects and motion and so forth. But it would be a mistake for me to then extrapolate from this and assume that somewhere on my hard drive or in my computer memory is a “file” which I have “dragged” “into” a “folder”. My perceptions via the interface may have consistency and practical utility, but they are not themselves a reliable guide to the actual state of the world.
Obstinate coherence and persistent similarity of structure are intriguing but they are limited in how much they can explain by themselves.
Dragging files around in a GUI is a familiar action that does known things with known consequences. Somewhere on the hard disc (or SSD, or somewhere in the cloud, etc.) there is indeed a “file” which has indeed been “moved” into a “folder”, and taking off those quotation marks only requires some background knowledge (which in fact I have) of the lower-level things that are going on and which the GUI presents to me through this visual metaphor.
Some explanations work better than others. The idea that there is stuff out there that gives rise to my perceptions, and which I can act on with predictable results, seems to me the obvious explanation that any other contender will have to do a great deal of work to topple from the plinth. The various philosophical arguments over doctrines such as “idealism”, “realism”, and so on are more like a musical recreation (see my other comment) than anything to take seriously as a search for truth. They are hardly the sort of thing that can be right or wrong, and to the extent that they are, they are all wrong.
Ok, that’s my personal view of a lot of philosophy, but I’m not the only one.
It sounds like you want to say things like “coherence and persistent similarity of structure in perceptions demonstrates that perceptions are representations of things external to the perceptions themselves” or “the idea that there is stuff out there seems the obvious explanation” or “explanations that work better than others are the best alternatives in the search for truth” and yet you also want to say “pish, philosophy is rubbish; I don’t need to defend an opinion about realism or idealism or any of that nonsense”. In fact what you’re doing isn’t some alternative to philosophy, but a variety of it.
Some philosophy is rubbish. Quite a lot, I believe. And with a statement such as “perceptions are caused by things external to the perceptions themselves”, which I find unremarkable in itself as a prima facie obvious hypothesis to run with, there is a tendency for philosophers to go off the rails immediately by inventing precise definitions of words such as “perceptions”, “are”, and “caused”, and elaborating all manner of quibbles and paradoxes. Hence the whole tedious catalogue of realisms.
Science did not get anywhere by speculating on whether there are four or five elements and arguing about their natures.