- May 18th, 2014, 3:25 am
#197296
Hi Xris. Yes I think we had reached an impasse. But I think it's still interesting to come back to it every now and then after a break. It's also still interesting, to me at least, to carry on exploring how different people see things and why that results in them having different opinions as to how the world works.
I think one of the differences of philosophical worldview that we identified before was a broad distinction between people who like to use metaphors, analogies and models and people who prefer to believe in things they can directly see and touch. I think that's exemplified in your dislike of the concept of concepts! As you said:
"We can not continue to use terms that have no value just because observations just happen to fit the concept."
In other words, constructing an abstract model in order to describe and predict observations is, to you, not what science is about. It's not enough for the model to be descriptively accurate if it does that by using metaphors, like the concept of "bending", that you don't like.
But that's why I'm always a bit puzzled by your liking for Gaede's ropes. They seem to me to be just as metaphorical as the concept of space-time. As I discussed in the OP of this thread, it's clear from the way that he uses his rope concept that he's not talking about actual ropes, made from strands of nylon, or whatever! So it's a metaphor. But, as I also discussed there, it has the disadvantage of being less predictively accurate than the more standard metaphors. A particular example being his explanation of gravitational lensing as being vaguely something to do with the ropes being attached to the Sun's corona. Nice image, maybe, but it simply doesn't work as a quantitative description of observed reality.
Why is that particular metaphor more satisfying? Why do you not get similarly annoyed by it?
Is it because it uses an analogy with just one everyday concept (the rope) rather than more than one? Obviously, as we know, you particularly dislike the way that aspects of the particle model and aspects of the wave model are both used in various parts of the description of observations known as Quantum Mechanics. I think your distaste for metaphors and analogies makes you dislike these things because they remind you that they are analogies. The rope analogy, on the other hand, since it uses only that one concept throughout, allows us to keep up the illusion that we are talking about something more than just an analogy with the everyday meaning of the word "rope". We can pretend that there is some sense in which we're talking about real ropes.