In reply to:

What does describe mean? Does "The set of all primes smaller than 100" count?

Open thread, May 29 - June 4, 2017

If it's worth saying, but not worth its own post, then it goes here.


Notes for future OT posters:

1. Please add the 'open_thread' tag.

2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)

3. Open Threads should start on Monday, and end on Sunday.

4. Unflag the two options "Notify me of new top level comments on this article" and "

Comments

sorted by
magical algorithm
Highlighting new comments since Today at 3:04 PM
Select new highlight date
All comments loaded

Three times we changed our mind about what’s the world’s biggest problem

https://80000hours.org/career-guide/world-problems/

"Finally, as we saw earlier, the majority of US social interventions probably don’t work. This is because problems facing the poor in rich countries are complex and hard to solve. Moreover, even the most evidence-backed interventions are expensive and have modest effects."

Cost-effectiveness of health interventions as found in the Disease Controls Priorities Project 2. See “The moral imperative towards cost-effectiveness in global health” by Toby Ord for more explanation.

"How to preserve future generations – find the more neglected risks"

Biosecurity: The threat from future disease

Artificial intelligence and the ‘control problem’

How to work out which problems you should focus on"

I want to find the way to preserve information very long-term, to send the message to any future civilisation, which may appear on Earth in next hundred million years.

For it, I would like to know the speed of atom diffusion in metals in millions of years - that is, what is the minimum chunk of metal, which will be able to preserve a bit of information. Any ideas?

Something dynamic. Like a machine which constantly checks the inside stored data in many copies. Produces a new independent copy every now and then.

Zapps every evolution which occurs in the reachable Universe, manages black holes, stars and so on.

A static solution is too vulnerable.

Yes, I have to add that I explore it as a solution of the x-risks problem, not the way to create new x-risks. :)

The solution is to send for future earthlings civilisation a lot of information about human DNA, global risks and our culture, so they will return us to life and escape our mistakes.

I know the surface of gold actually fluctuates. Prob titanium coated with iridium would be most stable. There are also ongoing studies of using lattice vacancies in diamonds that are pretty far advanced.

This always brings us back to the "communicating with aliens" problem too. Most settle on visual cues, and write it in binary. I still like to think of spectral lines as the most basic communication technique.

Have a story idea about finding an alien vessel that had a catastrophic fire inside, and all the instrumentation and computing storage has been destroyed. All we find inside is a book with iridium pages, that has fantastic theories on cosmology, planetary and stellar mechanics, etc. Turns out it is a childs book, made to be durable!

What does describe mean? Does "The set of all primes smaller than 100" count?

No, you should define primes, otherwise it is trivial.

How far do I need to define it? Does "The set of naturals smaller than 100 not divisible by 2, 3, 5 or 7"? count?

Sure it counts. Can you do better? For this one is wrong,

Well, "The set of all primes less than 100" definitely works, so we need to shorten this.

It doesn't work, it's a trivial solution. Get rid of the word prime. Rephrase!

But even if that was a solution, it's not the shortest one.