Laurence Tennant
laurencetennant.com · Personal blog · on HN since 2014
Laurence Tennant hosts essays by Stephen Bond on logical fallacies, Bayes' theorem culture, and critical thinking.
What HN saysCommenters cite "The Ad Hominem Fallacy Fallacy" to argue that questioning a speaker's trustworthiness is not ad hominem, and share the Bayes' theorem critique.
20HN people shared it
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Most-shared posts
- 1The Ad Hominem Fallacy Fallacy12 people · 12 points · first shared 2014 · 10 comments on HN
- 2Your Baloney Detection Kit Sucks2 people · 2 points · first shared 2014 · discussion on HN
- 3The Cult of Bayes' Theorem2 people · 1 points · first shared 2015 · discussion on HN
- 4Creatureofhavoc2 people · first shared 2017
- 5Why Cars are Crazy1 people · 2 points · first shared 2015 · discussion on HN
- 6Positivism1 people · first shared 2015
- 7Unicode shift cipher1 people · first shared 2018
What HN people wrote when they linked it
angoragoats · 2026-04-10
> For something to be an ad hominem you simply need to address the speaker rather than what was said
No, this is a common misconception. Addressing the speaker is part of it but is not sufficient by itself.
People who are quick to claim “ad hominem!” have been getting this wrong basically forever, so please feel free to educate yourself by reading this excellent post: https://laurencetennant.com/bonds/adhominem.html
“It is not a logical fallacy to attack someone; the fallacy comes from assuming that a personal attack is also necessarily an attack on that person's arguments.
Therefore, if you can't demonstrate that your opponent is trying to counter your argument by attacking you, you can't demonstrate that he is resorting to ad hominem.”
FabHK · 2021-01-30
Yes, the "appeal to authority = fallacy" can be employed to shut down legitimate arguments, as well as the "ad hominem = fallacy". There is a great clarification here:
"The ad hominem fallacy fallacy"
EDIT: debunking -> clarification
https://laurencetennant.com/bonds/adhominem.html
jdlshore · 2020-12-07
I’m going to hijack this comment to repost a link to “The Ad Hominem Fallacy Fallacy,” a favorite essay of mine. Anybody who thinks this article is an ad hominem should read it. It’s short and fun.
https://laurencetennant.com/bonds/adhominem.html
RodericDay · 2016-01-05
I think Stephen Bond did some excellent takedowns of the identity politics that has arisen around Bayes' Theorem back in the day. I wonder where he's at these days.
The Cult of Bayes' Theorem
http://laurencetennant.com/bonds/cultofbayes.html
> One of Yudkowsky's constant refrains, appropriating language from Frank Herbert's Dune, is "Politics is the Mind-killer". Under this rallying cry, Lesswrong insiders attempt to purge discussions of any political opinions they disagree with. They strive to convince themselves and their followers that they are dealing in questions of pure, refined "rationality" with no political content. However, the version of "rationality" they preach is expressly politicised.
thaumaturgy · 2015-06-24
Ad hominem fallacy fallacy: http://laurencetennant.com/bonds/adhominem.html
Pointing out that someone is not trustworthy when considering whether or not to trust their conclusions is not ad-hom.
tptacek · 2019-05-09
I can't do better than this post:
https://laurencetennant.com/bonds/adhominem.html
... and to say that most instances in which ad-hom is invoked on HN result in stupid debates about whether an argument is (a) actually ad-hom and (b) fallaciously ad-hom (a subtlety most invokers on HN don't really grok).
I think we already have a culture that rejects personalized arguments, and "ad hominem", which gets deployed because people have long ago pulled it out of one of those Internet "fallacy lists", virtually always just clouds discussions. It's certainly more corrosive than "whataboutism".
Honestly, I think it's possible that all "canned" fallacy arguments --- ad hom, whataboutism, argument from authority, straw-man --- basically contravene the "principle of charity" guideline, and that it'd be worth having the guidelines ask people not to deploy pre-canned responses to other people's arguments. You can make the "this is a fallacious ad hominem" argument, if you really know what you're talking about, without using the words "ad hominem", and that'll always be a better comment.
Optimize HN for better writing!
manish_gill · 2016-01-06
> I cannot judge to which degree these theses are bullshit.
Go the link, go to references, read about them. I'll outline the gist: Most of what Yudkowsky says is extremely sci-fi, no real basis in scientific fact, but stretching the current technological progress to the point where his opinions on things (stuff like transhumanism, singularity) can be justified.
What he's preaching isn't science. Certainly not rigorous experimental science. He (along with Bostrom) tends to engage in extreme hypotheticals. Which, sure if you're a philosopher, is fine. But even then, wouldn't you want your work to be judged by like-minded peers? But alas, here has a convenient excuse of being "auto didactic" to fall back on, so he can sit on his armchair and critique traditional education, and his lack of peer reviewed material.
Not to mention, and this is a bit of a pet peeve, I find that most LW people are too self-absorbed, I've literally seen a blog where the person who runs it "warns" the readers that what he writes is too complicated for people to follow. This sort of narcissistic, self congratulatory thinking is what puts me off more than anything. Writing long form posts on the Internet which use complicated words don't make you smart.
http://laurencetennant.com/bonds/cultofbayes.html is another critique. It comes off as bit crass, but stick with it.
> I've found LW a tremendously rich source of thinking tools and I'm convinced that reading or skimming a lot of the sequences have…
quuxplusone · 2025-09-22
There were dozens of such series in the late '80s and early '90s. My first guess is the "Lone Wolf" series mentioned above (launched 1984). It has a grimdark flavor; if you remember creepy illustrations, I'd look there first.
Other options on my bookshelf include "Fighting Fantasy" (including the famous "Creature of Havoc") — https://laurencetennant.com/bonds/creatureofhavoc.html
Or "Middle-Earth Quest" (1985-ish) — https://gamebooks.org/Series/270/Show
Or "SwordQuest" (1985) — https://gamebooks.org/Series/333/Show
Or "Fabled Lands" (1996) — https://en.wikipedia.org/wiki/Fabled_Lands
JohnHaugeland · 2022-08-07
> Appeal to grossness is fallacious.
I've already said this once in this thread. Stephen Bond says it better than I can: https://laurencetennant.com/bonds/bdksucks.html
hyper_reality · 2018-11-20
I also had a similar idea a few years ago for a CTF challenge, coming at it from a "modern Caesar cipher" perspective: https://laurencetennant.com/unicode-shift-cipher
Also a crude "modern Bacon cipher" using Punycode characters as the B's and ASCII-range characters as the A's.
danharaj · 2015-08-04
Useful reading: http://laurencetennant.com/bonds/adhominem.html
The post you're responding to is making the argument "Claiming that you aren't unbiased does not make you unbiased. Trying to be unbiased does not necessarily make you unbiased."
That's certainly not ad hominem at all.
ikeboy · 2015-07-02
The concept you're looking for is the https://en.wikipedia.org/wiki/Genetic_fallacy, a broader form of ad hominem.
Also, they didn't say it's bad because it's from reddit, the statement could be interpreted as saying that it's bad, and also that it's from reddit. Imagine http://laurencetennant.com/bonds/adhominem.html applied to the genetic fallacy, and you'll see what I mean.
owenmarshall · 2014-11-07
Please read "the ad hominem fallacy fallacy": http://laurencetennant.com/bonds/adhominem.html
0xDEAFBEAD · 2026-07-29
>It's ironic that the top reply to a comment about quality of discourse on this site is an ad hominem.
You might find the Ad Hominem Fallacy Fallacy page interesting:
"Argumentum ad hominem is the logical fallacy of attempting to undermine a speaker's argument by attacking the speaker instead of addressing the argument. The mere presence of a personal attack does not indicate ad hominem: the attack must be used for the purpose of undermining the argument, or otherwise the logical fallacy isn't there. It is not a logical fallacy to attack someone; the fallacy comes from assuming that a personal attack is also necessarily an attack on that person's arguments."
https://laurencetennant.com/bonds/adhominem.html
So for example, if I said: "The arguments for constructing an AI pause button are bad because they are being made by AI company employees", this would be a fallacious argument.
If I said: "HN users have this weird mental block where they fail to take AI progress seriously", that's not necessarily a fallacious argument, unless it's for the purpose of undermining an argument the HN user made.
harryf · 2017-06-15
Shame they didn't map some of the Fighting Fantasy books ( http://www.fightingfantasy.com/ ) or Steve Jackson's Sorcery Series ( https://en.wikipedia.org/wiki/Sorcery! - now made into a series of mobile apps http://www.inklestudios.com/sorcery/ ). Jackson & Livingstone really pushed this format far more than the "Choose Your Own Adventure" books.
Most of all I remember "Creature of Havoc" ( https://en.wikipedia.org/wiki/Creature_of_Havoc ) as being amazing and extremely hard. Instead of being an adventurer you play a monster with limited IQ forced to unravel the mystery of your own existence. It employed various techniques that prevented cheating like "If you have the key, add the number written on the key to this page number to open the door". One of those puzzles still has people discussing it http://laurencetennant.com/bonds/creatureofhavoc.html ( contains spoilers ). At 13 years old it took me and a friend 2-3 months to finally crack it.