Hacker Newsnew | past | comments | ask | show | jobs | submit | dlev_pika's commentslogin

AFAIK If I try to scan a dollar bill, both the hardware and the software won’t let me be.

How is this different?

Edit: I appreciate the responses! Thank you


Photoshop does that voluntarily; it's not required to by law. GIMP doesn't do it.

This is akin to trying to require all image editors to detect currency and refuse to process images of it. Making open source image processing software would probably have to be illegal because end users could trivially modify it to illegally process currency, or having general-purpose computers that can run software the government hasn't approved would need to be banned.


A dollar bill is exactly the same (roughly) always. Banning models of gun parts (or anything 3D printed, for that matter) is like trying to ban the patterns of dust in the wind. There are millions of permutations and ways to slice the problem.

Having never seriously looked into 3D printing and knowing essentially nothing about firearms, a few mostly-unserious questions come to mind:

1. Is there any value in 3D printing the inverse of the shapes one would need to use as a mold?

2. How many subdivisions of gun-shaped part I wonder are needed before the ultimate intended shape is obscured without impacting the functionality

3. Given 2, is there even any value in 1.


> slice the problem

Pun intended


US currency has machine-detectable identifying markings incorporated in the design. "Ghost gun" parts do not.

One practical difference is that you can make dollar bill detection relatively robust. Sure, you could cut it into 4 pieces and scan them separately, but you'd still get stuck when it comes time to print them. There are only finitely many dollar bill shapes. But there are infinitely many plausible gun components, and infinitely more ways to divide them into sub-assemblies.

> but you'd still get stuck when it comes time to print them.

It also seems a lot harder to DIY an inkjet or laser printer. The parts needed to DIY a 3d printer are a lot simpler.


It would be interesting to test what the minimum detectable piece of US currency is. (I wouldn't want to do it on a network-connected system, though.)

There is a pattern of yellow dots on the currency. I do not know at what size they tile across the paper, but the piece of currency would have to be smaller than that, most likely.

Far easier to dump the firmware and NOOP out that algo.


Some critical differences between the situations that come to mind:

- The problem of counterfeit currency is well acknowledged and has roots in antiquity. Reasonable people agree that currency genuinely cannot do its only job if counterfeiting is possible, and have had that agreement for thousands of years. In addition, the sole right to print currency is given to the US government in its constitution (almost certainly for this reason). These two things grant government control over printing currency both a moral and a legal legitimacy that government control over printing gun parts doesn't have.

- Because the government has control over the design of legitimate currency, it is actually practical to prevent software from reproducing it. See: https://en.wikipedia.org/wiki/EURion_constellation . Gun parts have no such distinguishing characteristic, and cannot be made to have one, since there is no authoritative body responsible for all of them. Having such a marking could be made legally mandatory, but it is not actually required for the function of the part, whereas currency needs to match the authentic design in order to be useful. It is therefore much less practical and effective to mark gun parts to prevent replication than it is to similarly mark currency.

- Creating your own guns specifically (and weapons, generally) is widely seen as a natural or God-given right. I would go so far as to say that it is intrinsically human, and that losing access to it would be as painful to some as losing access to rock 'n roll. I would say that due to this pain, losing that right is one of the chief signs of an enslaved people. While not everyone would agree with me, many would, which gives the issue a divisive moral edge. By contrast, creating your own currency might be seen as some sort of natural right by some people, but creating your own US Dollars certainly is not seen that way by anybody. Well, I'm sure you could find someone, but you know what I mean.

- As far as I know, there is no law compelling printer/photocopier manufacturers to use anti-counterfeiting software, and compliance is voluntary (but apparently pretty widespread -- though I doubt it's universal). A similar voluntary setup with 3D printer manufacturers would be less objectionable (though also much less likely to succeed). Introducing any sort of mandatory compliance regime introduces friction, slows innovation, and invites corruption.

- Manufacturing gun parts is actually pretty easy, and could be accomplished via many methods accessible to hobbyists, ranging from whittling by hand to duct taping hardware together to lost wax casting to desktop CNC to a desktop injection molding setup to metalworking on a lathe in a garage machine shop. It is in no way limited to 3D printing, though that admittedly lowers the bar a bit. Learning to work on guns is not significantly harder than learning to work on cars, though perhaps fewer people know how to do it. Thus, a focus on 3D printing seems much more driven by sensationalism, paranoia, and ignorance of this fact than it is by practical assessment of the issue. By contrast, creating even minimally recognizable counterfeit currency without the assistance of a computer is practically impossible and certainly cost-prohibitive. In manufacturing gun parts, it is perfectly practical in some cases to do the equivalent of drawing a dollar bill with a crayon -- something much less successful in the counterfeiting world.

- Adding broad pattern-recognition controls to a 3d printer is a novel and difficult problem that will likely impact innocent people doing legal things. Preventing the printing of accurate-looking currency has a much more narrow impact, and is much more focused on people doing illegal-adjacent things.

Without meaning any malice toward your question, I mention that I write because you have stepped on one of my pet peeves: it seems to me that an inability to see the difference between things that are, in fact, different, is one of the major failure modes of modern society in general. We need an appreciation for texture and nuance if we are to navigate the world rightly.


You cannot defend yourself from a hungry coyote or surprised mountain lion with a dollar bill but you can certainly protect yourself or your child from one with a gun

I think I’ve seen this article posted every day for the past week or so

No you haven’t, because it was published today. What you’ve seen are past articles from the same author on the subject that all share the same "The Future of Everything Is Lies, I Guess:" prefix.

Oh that’s what’s going on? Was confused as to why the same title kept popping up. Thank you.

“No war but class war” rings as true in 2026 as it did 40 years ago

Sure, although the obsession with "CEOs and billionaires" does have the ring of the 300k HHI software-engineer class hoping to play class enemies above and below them against each other.

Software engineers are in the same class as the people below them - the working class. The entire concept of "middle class" originates from a time when the middle class were non-nobility who were, nonetheless, sufficiently powerful that they needn't worry about things like "keeping their jobs", whether because they were their own employees (as were nearly all doctors, lawyers, etc.) or because they had sufficient social capital not to worry about such trivial things as paid labor.

I want to be clear here: Eton boys were (and are) predominantly middle class, not upper class. In the US, we allowed the idea to be perverted, perhaps because we do not have nobility, and so there is no true "upper class". Given this, the reality is that we are bifurcated into a working class and an owning or capitalist class - though, many would argue (correctly, in my view) that we are in a feudal regime now, rather than a capitalist regime.

To put perhaps too fine a point on it, software engineers are house slaves, and, yes, CEOs and billionaires have done a good job of convincing the field slaves that the house slaves are their enemies, and of convincing house slaves that the field slaves are inferior and just want to take what the house slaves have without working for it.


That is an, uh, unfortunate choice of metaphor. Would recommend leaving that club in the bag the next time this comes up.

Anyhow. Software engineers, like, hire nannies when their kids are young. Have cleaning services. Accumulate nice little slices of the S&P500. Generally own houses.

Minor nobility is a better comp than anything to do with chattel slavery.


Waaay too much

It’s ok if you do it where you arrive at taps forehead

Crazy that this is literally one of the lines Trump ran on - weaponizing the DOJ.

The Now I Get non-technical version, because I need someone to explain this to me x)

https://nowigetit.us/pages/d7f94fd0-e608-47f9-8805-429898105...


Yeah, but it seems those other protections would/could possibly be a coin toss (eg a successful defense in a trial) and quite costly even if they never get to that stage, and you need a bit more certainty than that. Otherwise help can only come from those willing to become martyrs

Modifying pardon powers requires a constitutional amendment? That’s wild.

It's wild that anyone doesn't know that. It's less surprising than the fact that disallowing someone with 34 felony convictions from being President would also require a Constitutional amendment. Both the pardon power and the qualifications for President are specified by the Constitution, so of course the Constitution must be amended to change them.

> It's wild that anyone doesn't know that.

Lots of assumptions here, friend


I’m surprised we haven’t heard more direct action incidents - there is no way the shameless behavior of our high profile oligarchs is not ruffling a few feathers too much.

Maybe they are just not reporting near misses


Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: