Comment by jodrellblank
11 hours ago
“Reflections on trusting trust” is the paper that posits a compiler which is edited once so that when it compiles a program, it adds a security vulnerability to it, and when it compiles it’s own source code, it adds this edit into itself. Then it is used to compile its own source code once. Then this edit is removed.
Now any study of the program or compiler source code will not show any vulnerability, but compiling the program will make a vulnerable program, and recompiling the compiler from its clean source code will not fix the situation.
This carrying down of a pattern which is not written down anywhere, a flaming torch lighting a torch lighting a torch, is analogous to four billion years of life on Earth. We talk like DNA is an everything-code that defines a human and a human brain, but it’s the implicit behaviour of cells (‘compiler’) and the mechanisms inside them which interpret DNA. The unbroken chain of life getting more and more complex and never being restarted from scratch, with the behaviours not written down anywhere for us to study. How does DNA arrange for x, y, z to happen? Maybe it doesn’t at all.
Accidentally stumbling on a mechanism that is simple enough to be recreated with every human birth might be possible, accidentally stumbling on a mechanism that took evolution billions of years to find and which it has hung onto by copying it and has never recreated it from scratch, could be much less likely, in a much bigger search space.
> Accidentally stumbling on a mechanism that is simple enough to be recreated with every human birth might be possible, accidentally stumbling on a mechanism that took evolution billions of years to find and which it has hung onto by copying it and has never recreated it from scratch, could be much less likely, in a much bigger search space.
Maybe, but you could make the same argument about anything artificial.
I don't know what point you're making; I'm making the point that it might be harder to discover what makes humans human, than is often suggested. You can't make the same claim about "anything artificial", we know how to dry muddy clay into clay bricks and stack them into a brick wall, and that can be taught from scratch to new people in hours.
You can make a similar argument with a company like ASML where their secret sauce is the organisational ability to fine-tune 100,000 components into a precision Silicon-wafer etching machine. You're far more likely to accidentally stumble upon "how to recreate a mud hut" than "how to recreate ASML". Okay, and...?