Actually, if "if you replace every bit of the original code" and you are not using anything of that code your work is not subject to the GPL if you did not distribute anything until the work was done.
What will be an issue in 10-20 years I don't know, but that is the point, we can't know. Trusted by more than 2.
He is just looking for some new challenges to complement the current work. I thought that this would function something like a proctor's password on an exam; but that does not seem to be the case.
Environmental impact has not been a huge issue in the past. In the original source code from a few years ago see e. If we look at information theory we can prove that if you have a project that requires more than one person to execute we will have need for information exchange. What book? I know it isn't, but it hasn't dampened my enthusiasm for the craft of programming in 20 years.
We can already create provably correct software, it's done for airplanes, traffic control software, power plant control systems etc.
The more complex the problems the more complex the tools and finally, to solve arbitrary problems, you have infinite complexity. I did not enable any access dates or other conditional release settings. They are used to run automated control systems, robots, factories, trad stock, play games, post on facebook, make and connect phone calls and thousands and thousands of other things.
I'll release each chapter draft as a standalone ebook for example. In the world of Turing machines, this would be equivalent to assuming your tape is of finite length but whenever you try to read off one end, someone quickly comes over to the machine and splices in some more tape. Linked 8.
I think we would have heard of it.
While I might lack the, professional, weight of these gentlemen I think there is more to be said in the vein of Gary Bernhardts response. This was really just written as a short followup to the first one: Read on and I'll show you why: Some things are, unfortunately, not possible in the real world.
It's not like it requires a new hardware design or anything. This is used to target a cell in the subsequent row.