Monty Hall Problem -- Questions

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Discussion Overview

The discussion revolves around the Monty Hall problem, focusing on the probabilities involved in the game and the implications of randomness in decision-making. Participants explore the assumptions of randomness, the impact of contestant biases, and the interpretation of probabilities in various scenarios.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Mathematical reasoning

Main Points Raised

  • Some participants argue that the initial probability of choosing the correct door is 1/3, while the probability increases to 2/3 after one door is revealed, but others question the validity of this assumption based on randomness.
  • One participant presents an analogy involving a card game to illustrate that the outcome can depend on the shuffling method, suggesting that randomness affects the predictability of outcomes.
  • Another participant asserts that the contestant's bias does not significantly impact the game if the goats are placed randomly, maintaining that the probabilities remain defined by the initial setup.
  • Some participants express skepticism about the Monty Hall problem as a representative example of probability, suggesting that real-world biases and randomness complicate the scenario.
  • There is a contention regarding whether the contestant's choice can influence the overall probabilities, with some arguing that it can lead to different outcomes based on their biases.

Areas of Agreement / Disagreement

Participants generally disagree on the implications of randomness and bias in the Monty Hall problem. While some accept the standard probability model, others challenge its applicability to real-world scenarios, leading to an unresolved discussion.

Contextual Notes

Participants highlight that the assumptions of randomness and uniform distribution of outcomes may not hold in practical situations, which could affect the perceived probabilities. The discussion reflects a range of interpretations regarding how randomness and contestant behavior interact in the context of the Monty Hall problem.

  • #31
WWGD said:
So you believe you can conceive every single possible correct solution?
No.

To defend that statement, which I thought I did pretty clearly, all I need to "conceive of" is one. By definition, to be "correct" another other solution must ultimately arrive at the same correct answer,1/(1+Q). If the contestant has no knowledge of where the car is, this is the most general, and correct, answer. Another solution can't both be correct, and get a different answer. (Note that 1/(1+Q) includes the less general, but correct, assumption that Q=1/2 so the probability is 2/3.)

Otherwise, we'd really have a paradox. So maybe you should go back to your imaginary world where mathematics doesn't have to be consistent.
 

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