> It isn't property, I can't hold on to it, I can't touch it, and I can't steal it. You don't have any right to an idea over any other human. This is an abstract construct which attempts to create an artificial commodity where there isn't one.

Apart from "holding on to it," what you say in the quote sentence is true for pretty much any property. In a strict sense, property is what you can defend. However, in order stop people using violence to defend their property, the government steps in and defines material property and vows to defend it for you through laws about theft, etc.

So property is an abstract concept enforced by the government.

Now, the government simply looks around and says, "what else is valuable for people that we can protect for them?" One is land ownership. You can't physically be on the border of your land all the time with a gun, so the government has laws about trespassing and poaching, etc., and enforces them for you.

Money is another abstract concept the government defends. It makes things easier for everyone to have a common currency, instead of trading chickens and cows, so even though $1 doesn't have a "material" meaning, it represents value and therefore people have agreed to respect it. The government proposes a country-wide currency to replace instability of ad-hoc currencies.

Another is copyright. The government agrees that creative people deserve "ownership" over their work, so they can profit from it, and this bargain is struck in order to encourage development of culture. It's a concept of intellectual property that is simply a contract between the people and the government, and the government vows to defend it.

Another example is patents. The government wants to encourage research and development, and one way it sees to do so is to help inventors profit from their ideas by vowing to defend their rights to it for a certain amount of time.

Before you get all upset (if you're not already), I agree very, vere strongly with the position that there are clearly problems with patents--specifically that they encourage many things we find distasteful as society, and the minefield effect is terribly detrimental, especially in certain areas like computer programming. There's no question that patents are a problem today, with the pace of technological development being what it is, and it's clogging up the legal system like nothing else. These are things that need to be solved. If the solution is to abolish patents I'm not even necessarily against that, though I think I agree with Judge Posner that they make sense for certain industries.

However, the claim that patents and copyright and any intellectual property is not consistent with the idea of material property is, imho, completely false. All of these concepts share the same root, that the government vows to defend your ownership over something. Just because some property is material and other property is "intellectual" does not make the latter "abstract" and therefore invalid, because the whole concept of property is abstract, it is nothing but an agreement.

This is the role of government, really, and I'd say one of its only legitimate roles, apart from infrastructure building, is to establish agreements on what we consider property, and enforce them. Now, whether this is done well is a subject of debate, but conceptually it is self-consistent.

If you don't agree with this, feel free to grab your gun, squat somewhere with everything you own, build a wall, and try to keep everyone from taking your stuff, but otherwise you have to acknowledge that the whole concept of property itself is as intangible the idea of intellectual property.

That doesn't excuse certain aspects of intellectual property from being ill-defined or badly designed, but the concept is not invalid. The extension from material property is a logical one.