少点错误 03月22日 15:53
A Short Diatribe on Hidden Assertions.
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文章探讨了在论证过程中常见的逻辑谬误,即论证者在没有充分支持其假设或断言的情况下,就得出结论,从而试图驳斥某个观点。文章通过几个例子,如关于社会主义、气候变化和上帝存在的讨论,揭示了这种谬误的普遍性。作者强调,要评估一个论证,需要仔细检查其前提和隐含假设。文章最后提出了一种更严谨的论证方式,并呼吁在辩论中保持批判性思维。

🤔 许多人倾向于在没有充分支持自身假设的情况下,就断言某个观点是错误的,尤其是在试图驳斥他们不喜欢的观点时。

💡 文章列举了几个常见的例子,如“社会主义导致大量盈余”的论证,以及关于气候变化和上帝存在的讨论,这些例子都存在隐藏的假设。

🧐 针对“全能的、仁慈的上帝为何允许苦难存在”的常见问题,文章指出,如果质疑前提,可以发现多种解释,如上帝并非全能或并非全善。

👨‍👩‍👧‍👦 文章类比了父母与子女的关系,指出仁慈的上帝可能允许苦难,是为了让人们在逆境中成长,培养责任感,而不是成为“直升机上帝”。

Published on March 22, 2025 3:14 AM GMT

tl,dr: I might be bitter about what some people call logic.

Suppose I posit and assert that both that A implies B, and that B is false. From these statements you would immediately conclude that A must be false. Given what I know about the LW crowd you might also be able to point out that an alternate explanation exists: one or more of my assertions could be false. When listed plainly like this, it can be hard to miss. 

Despite the simplicity of the above, I've noticed a tendency of many pundits to fall into the trap of conclusively proving the falsehood of a statement they don't like, without bothering to support their own assumptions or assertions. Or at least people trying to shut down arguments do.

Let's decompose a few examples.

A trivial, but common, example:

    Socialism leads to an abundant surplus.Country D suffers from severe poverty.Conclusion: Country D doesn't practice ‘real’ socialism.

Another:

    Atmospheric models suggest that increasing temperatures are causing massive climate impacts.Current climate conditions are largely within norms of the last 200 yearsConclusion: ‘Global warming is a hoax.’

One example which has been standing out in my mind recently is usually posed as a question: “How could a loving God permit so much suffering?” 

Recently this has been making the rounds on social media in the form of Niel DeGrasse Tyson quotes. Here's one of them:

Interviewer: “That leads to the next question, because a few people on the lines are asking: ‘Do you believe in God?’”

Dr. Tyson: “I am not convinced. Here’s the thing. Every time I talk about God with someone who is a believer, God is all-powerful, and all-knowing, and all-good. Right? Good is a big part of this. And then I look at all the ways Earth wants to kill us. You know, a tsunami takes out a quarter-million people. Hurricanes. Earthquakes. Tornadoes. Floods. And I add all of that up. Either the God is not all-powerful or is not all-good. But it can’t really be both, given all the ways the universe wants to kill us.”

-Opie and Anthony podcast #1889

For convenience I'll use the common shorthand and take ‘God’ to mean ‘all-powerful,’ as in many Western religious traditions. As I understand it, the simplified argument proceeds like this:

    A loving God would prevent suffering.Extreme suffering exists in the world.Conclusion: God does not exist.

As before, this conclusion is one valid inference if you accept points one and two. But dig a little deeper and we can find several more alternatives if we question the assertions, including Dr. Tyson's alternatives:

And we can keep going:

A detailed discussion of the above realistically depends on an exact definition of ‘omnibenevolent’ and ‘God’, and maybe we should be playing Taboo. But my point today is not about religion. My point is about hidden assertions. To make a convincing case for the conclusions, you have to be able to make a convincing case for the statements and implications you make along the way.[1]

For the sake of brevity and instead of diving into the psychology that leads to this type of error, I'll instead offer one slightly more self consistent alternative to the assertions above:

Consider for example the analogy of a loving parent. While parents can range from imperfect to down right rotten, it is easy to imagine parents who would do everything in their power to help their children, at least to the best of their understanding. Do loving parents prevent their children from experiencing any pain? Some clearly try, but many of us acknowledge that this will likely have negative consequences for the child who grows up unused to adversity. Point number one above hits a little differently when analogously rewritten as ‘a loving God is an extreme helicopter parent’.

If we simultaneously accept the existence of a loving God and a world with suffering, we would need to posit some godly benevolence in letting people suffer. With children we might say they need challenges to grow, or need to learn the consequences of their own actions. Personally, I see the value of maintaining personal accountability, even at high cost. The kind of accountability that could not be brought about if a helicopter God saves us from our every mistake and trial. Put more simply, could we posit that an omnibenevolent God might care more about what kind of person we become than what circumstances we endure?

I'm not trying to make the case for or against the existence of an omnibenevolent God. Others have dealt with the problem of evil on a much deeper level than I can. (For example see Problems of evil.) But when I hear someone try to shut down any and all discussion by saying “How could a loving God permit so much suffering?”, I have a knee-jerk response: “Have you tried answering that question?” 

  1. ^

    I realize I'm committing the same mistake I'm critiquing. The argument decomposed as

      Pundits use logic to win arguments.Pundits rely on hidden assertions.Conclusion: Pundits are bad at logic.

    conveniently ignores the fact that pundits make flawed arguments because they prioritize rhetorical effectiveness over logical rigor. People often know their implicit assumptions wouldn’t hold up under scrutiny, but they push the argument anyway because it’s persuasive to their audience. But being nuanced like that didn't scratch the itch to complain about it.



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逻辑谬误 论证 隐藏假设 批判性思维 辩论
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