I'm sorry, but what new bull shit is this?
No way, really? Seriously?
Intention is more central than evidentiary accuracy (similarities/dissimilarities) when evaluating an analogy? Are you also a mind reader?
What has reason become in 2017? Does everyone get a prize just for trying?
I suggest disregarding this thread if you want to learn anything about the logic of analogies.
Saz Chan >^-^< 's explanations are truly frightening and not at all in the mainstream understanding of analogical reasoning. She is bending over backwards to avoid admitting an outright error. Even if the intention to prove something is what matters, arguing from an irrelevant case demonstrates a conflict in intentions: the intention to prove something using the analogy and the (contextually assumable) intention to debate on a particular topic. If the analogy has nothing to do with the topic, grasping the intentions of the agent is truly an exercise in using reason to talk about madness...
I mean that :Even if you do grasp the agent's intention, you can always question whether the use of the analogy is suited to the agent's intention. And then you'll really need to be a mind reader. If you claim to grasp an agent's intention and it turns out that the intention you claim to grasp contradicts another graspable intention of the agent (sorry that phrasing is so awkward, I'm trying to write this fast), what then? Where do you go from there?
That there is concept called 'false analogy' is everything you need to know if you want to understand my posts. There is nothing 'ineffective' about declaring a false analogy.
From wikipedia now (which is a repetition of what Stanford refers to as the 'common sense view of analogies' which they attribute to aristotle):
Analyzing arguments from analogy[edit]
Strength of an analogy[edit]
Several factors affect the strength of the argument from analogy:
- The relevance (positive or negative) of the known similarities to the similarity inferred in the conclusion.[2][3]
- The degree of relevant similarity (or dissimilarity) between the two objects.[2]
- The amount and variety of instances that form the basis of the analogy.[2]
Counterarguments[edit]
Arguments from analogy may be attacked by use of
disanalogy,
counteranalogy, and by pointing out
unintended consequences of an analogy.
[1] In order to understand how one might go about analyzing an argument from analogy, consider the
teleological argument and the criticisms of this argument put forward by the philosopher
David Hume.
According to the analogical reasoning in the teleological argument, it would be ridiculous to assume that a complex object such as a watch came about through some random process. Since we have no problem at all inferring that such objects must have had an intelligent designer who created it for some purpose, we ought to draw the same conclusion for another complex and apparently designed object: the universe.
[1]
Hume argued that the universe and a watch have many relevant dissimilarities; for instance, the universe is often very disorderly and random. This is the strategy of "disanalogy": just as the amount and variety of relevant similarities between two objects strengthens an analogical conclusion, so do the amount and variety of relevant dissimilarities weaken it.
[1] Creating a "counteranalogy," Hume argued that some natural objects seem to have order and complexity --- snowflakes for example --- but are not the result of intelligent direction.
[1] Finally, Hume provides many possible "unintended consequences" of the argument; for instance, given that objects such as watches are often the result of the labor of groups of individuals, the reasoning employed by the teleological argument would seem to lend support to polytheism.
[1]
False analogy[edit]
A false analogy is a faulty instance of the argument from analogy. (emphasis mine)
An argument from analogy is weakened if it is inadequate in any of the
above respects. The term "false analogy" comes from the philosopher
John Stuart Mill, who was one of the first individuals to engage in a detailed examination of analogical reasoning.
[2] One of Mill's examples involved an inference that some person is lazy from the observation that his or her sibling is lazy. According to Mill, sharing parents is not all that relevant to the property of laziness.
[2]
I'm aware that it is pretentious of me to act so outraged about constructing philosophical concepts (i.e my rhetorical questions), but such a dubious philosophical concept as intention really has no place in considerations of analysis of arguments that use analogies (except to show how dubious the use of any analogy is). Or the analysis of any argument actually, intentions just don't count. As you can see (i hope) there is nothing about it on wikipedia, nor on the page in the encyclopedia, except when Stanford's entry points out that the introduction of
any analogy is biased.
Finally, I would just mention that thought experiments and analogies are both treated with near-exclusionary suspicion by the most skeptical analytic philosophers/philosophers of mind publishing in the academy, such as Dennett (thought experiments) and some Bayesian analysts (analogies). Obviously philosophers, usually having little facility in fact-gathering disciplines, might be tempted to turn to analogies and thought experiments in order to demonstrate principles they want to argue for, but this is their own problem, and no one should be trying to change argumentation guidelines just to mask their ignorance in a domain... Certainly not in ways that prioritize 'intentions' (a very very unlikely philosophical conception) over evidence. Clearly, some of us don't feel weakened when 'unable to resort' to thought experiment or analogy. I certainly don't.