# Questions tagged [bayesian]

Bayesian reasoning is a probabilistic approach to inductive and abductive reasoning, based on Bayes' rule, that posits when one event implies a second event is likely, that given the second event occurring, that increases the likelihood of the first event.

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### How to accomodate hyperintensionality in a Bayesian framework?

Generally, propositions are modelled as sets of possible worlds, and Bayesians define a credence function on the set of those propositions. They then adopt new credence functions in response to new ...
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### What approaches are there to resolving the problem of new theories in Bayesian epistemology?

Bayesianism is thought to have a problem accounting for the development of new theories/beliefs. Since Bayesians would like to proceed by updating prior credences in response to new evidence via ...
57 views

### Backwards Bayesian argument for alien visitation?

Let A = the hypothesis that aliens are visiting Earth Let E = evidence that aliens are visiting Earth The posterior probability that aliens are visiting Earth, given some evidence, P(A|E), can be ...
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### Consequences and importance of the "No Free Lunch Theorem"?

So I was watching this and was wondering about the consequences and importance of the "No Free Lunch Theorem" David Wolpert: that if I have any particular reasoning algorithm be it in say ...
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### Does Aumann's agreement theorem extend to moral propositions?

Aumann's agreement theorem says: two perfectly rational agents with the same prior estimate of an event's probability and common knowledge of one another's posterior estimates cannot come to ...
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### Is Occam's Razor a Prior?

In Bayesian statistics, the posterior probability of a hypothesis is composed of two parts: the prior, reflecting our initial belief in a certain hypothesis, and the likelihood, which represents how ...
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### Is modal logic too coarse-grained? [closed]

Modal logic has "necessary" operators (true in all worlds) and "possible" operators (true in some world). Compare this to probability, where only probabilities of 1 would be "...
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1 vote
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### Absolute confirmation of Carnap and consistency condition

In formal epistemology, consistency condition states that: An evidence E can't confirm both H and its negation, not-H. Carnap states that for the concept of absolute confirmation, the consistency ...
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### Questions on "Bayes or Bust?" by Earman

In bayesian epistemology, we usually find the bayesian theorem expressed in relation with three proposition: H, hypoyesis, E, evidence, K, background knowledge. In particular, in "Bayes or Bust?&...
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### Probability vs Possiblity vs gambling knowledge gap for a beginner

Probability is a difficult subject for me to grasp. I watch many religious vs atheist vs philosopher debates on YouTube where probability is often brought up, and because of my poor understanding I ...
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### Term for this bias kind of probability bias related to choosing the wrong reference class to calculate prior from? [closed]

Let's say that you want to calculate the prior for a woman in her 40s getting breast cancer. P(H) But instead of using the base rate from women in their 40s getting breast cancer, you use the base ...
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### Guessing the past - Bayes - Throwing Dart

I'm trying to understand how Bayes formula helps us make guesses about the past. What are your thoughts about the following philosophical metaphor regarding claims about events in the past? Whenever ...
302 views

### What is my fallacy? LSAT Reasoning Question: Titanium Ink

I have a question regarding an LSAT Reasoning question and it drives me crazy Question is: Until recently it was thought that ink used before the sixteenth century did not contain titanium. However, ...
1 vote
112 views

### Using Bayes Theorem in a Court Case - dementia and testamentary capacity

I'm trying to learn how to use Bayes theorem to explain probabilities in court cases related to dementia and testamentary capacity. Let's say that we are trying to explain the probability for a person ...
1 vote
180 views

### Does Bayes' Theorem justify rejecting an argument for the supernatural from a well-supported miracle?

Suppose you have really good evidence for a miracle. Let's say that given the evidence, the probability of the miracle having occurred is about 80%. Now, you also know that miracles can only occur if ...
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417 views

### Logical Interpretations of Probability

According to Wikipedia's page on probability interpretations... Logical probabilities are conceived (for example in Keynes' Treatise on Probability) to be objective, logical relations between ...
1 vote