″...what is some evidence that theists are less [rational] than atheists are?” is an incomplete question.
(tl;dr By talking about theists as a group, we are organizing people around their belief in something false that they generally should not believe in that both causes and is correlated with more general irrationality. Other than the criteria we used to organize the group, we shouldn’t expect to find many other universals, just significant patterns with exceptions.)
Are all theists less rational than all atheists are? Obviously not, under any important definition, for the same reason each person who eats 4000 calories and less than 50g protein daily is not less healthy than each person who eats fewer calories and more protein, and each person looking at a Japanese newspaper does not speak better Japanese than each person not looking at a Japanese newspaper speaks Japanese.
We can still say important things about the basis by which we organized people into these groups. They can have both direct causal effects and statistical significance from indirect links to other measurable things. For example, looking at a Japanese newspaper can cause one to get better at speaking Japanese, and looking at a Japanese newspaper is correlated with having Japanese relatives who help one learn Japanese.
Finally: all else equal, looking at a Japanese newspaper is better than nothing for learning Japanese, and it’s also better than what most people are doing now for learning Japanese.
If we’re organizing people into “theist” group and a second group made of everyone else, “theists are less [rational] than atheists are,” represents some different notions that have different proper responses among them.
If the assertion is “being a theist is correlated with being irrational (and/or playing the banjo, etc.),” then that claim needs to defer to science and new evidence, as I think you are saying.
I say “defer to” because there is an appropriate confidence someone with my amount of evidence should have in the claim. I feel very comfortable claiming that the top contributors to lesswrong are almost certainly not also the top contributors to the magazine Seventeen, despite a dearth of scientific studies on the subject.
It may be worthwhile to discuss the amount of confidence someone with a certain amount of evidence should have in a specific claim. My first response to a claim like “People who believe the soul influences some human speech (or theists, or whoever) are, on average, as rational as those who believe speech is not influenced by a soul,” or “The (first? I’m not sure what conspiracies are popular) moon landing was faked,” is to ask about what evidence the claimant currently possesses and how they process it. This is often more important than determining the truth of the original claim, which often will be best determined by gathering new evidence. In such a case, what’s really being discussed is not the truth of the original proposition, but the reasonableness of the original statement, so no evidence on its truth is relevant.
If the assertion is “being a theist causes irrationality,” truths are entangled. That’s not a dogma I cling to, and each individual has other influences in his or her life that may make them an exception, but I’d like to hear some kind of response to those arguments or I won’t feel obliged to go looking for evidence (unless something important hinges on my being right).
This depends on theism being irrational, which I think it is for most people—not having conducted studies, of course. For many people, theism is rational, particularly the very young, who should notice a pattern forming in which their parents are eventually right about things the child does not understand because they are too complex.
This does not depend on acts (such as thoughts) designed to induce a belief in theism being irrational.
If the assertion is “all else equal, a person with a given set of beliefs is more rational without the additional belief of theism,” then yes, on average...if we have organized all human minds by their belief in a proposition that most should think false, then those who are inappropriately theist are many, those who are inappropriately atheist are few, those who are appropriately theist are few, those who are appropriately atheist are comparatively many.
If the assertion is “based on the knowledge held by the reader of this sentence, he or she is almost certainly being irrational if he or she is theistic,” that is true with a good deal of help from selection bias, but one could say a similar thing about American adults.
The concept of all else equal/ceteris paribus might be useful here.
What do you mean?
″...what is some evidence that theists are less [rational] than atheists are?” is an incomplete question.
(tl;dr By talking about theists as a group, we are organizing people around their belief in something false that they generally should not believe in that both causes and is correlated with more general irrationality. Other than the criteria we used to organize the group, we shouldn’t expect to find many other universals, just significant patterns with exceptions.)
Are all theists less rational than all atheists are? Obviously not, under any important definition, for the same reason each person who eats 4000 calories and less than 50g protein daily is not less healthy than each person who eats fewer calories and more protein, and each person looking at a Japanese newspaper does not speak better Japanese than each person not looking at a Japanese newspaper speaks Japanese.
We can still say important things about the basis by which we organized people into these groups. They can have both direct causal effects and statistical significance from indirect links to other measurable things. For example, looking at a Japanese newspaper can cause one to get better at speaking Japanese, and looking at a Japanese newspaper is correlated with having Japanese relatives who help one learn Japanese.
Finally: all else equal, looking at a Japanese newspaper is better than nothing for learning Japanese, and it’s also better than what most people are doing now for learning Japanese.
If we’re organizing people into “theist” group and a second group made of everyone else, “theists are less [rational] than atheists are,” represents some different notions that have different proper responses among them.
If the assertion is “being a theist is correlated with being irrational (and/or playing the banjo, etc.),” then that claim needs to defer to science and new evidence, as I think you are saying.
I say “defer to” because there is an appropriate confidence someone with my amount of evidence should have in the claim. I feel very comfortable claiming that the top contributors to lesswrong are almost certainly not also the top contributors to the magazine Seventeen, despite a dearth of scientific studies on the subject.
It may be worthwhile to discuss the amount of confidence someone with a certain amount of evidence should have in a specific claim. My first response to a claim like “People who believe the soul influences some human speech (or theists, or whoever) are, on average, as rational as those who believe speech is not influenced by a soul,” or “The (first? I’m not sure what conspiracies are popular) moon landing was faked,” is to ask about what evidence the claimant currently possesses and how they process it. This is often more important than determining the truth of the original claim, which often will be best determined by gathering new evidence. In such a case, what’s really being discussed is not the truth of the original proposition, but the reasonableness of the original statement, so no evidence on its truth is relevant.
If the assertion is “being a theist causes irrationality,” truths are entangled. That’s not a dogma I cling to, and each individual has other influences in his or her life that may make them an exception, but I’d like to hear some kind of response to those arguments or I won’t feel obliged to go looking for evidence (unless something important hinges on my being right).
This depends on theism being irrational, which I think it is for most people—not having conducted studies, of course. For many people, theism is rational, particularly the very young, who should notice a pattern forming in which their parents are eventually right about things the child does not understand because they are too complex.
This does not depend on acts (such as thoughts) designed to induce a belief in theism being irrational.
If the assertion is “all else equal, a person with a given set of beliefs is more rational without the additional belief of theism,” then yes, on average...if we have organized all human minds by their belief in a proposition that most should think false, then those who are inappropriately theist are many, those who are inappropriately atheist are few, those who are appropriately theist are few, those who are appropriately atheist are comparatively many.
If the assertion is “based on the knowledge held by the reader of this sentence, he or she is almost certainly being irrational if he or she is theistic,” that is true with a good deal of help from selection bias, but one could say a similar thing about American adults.