system
Given the following post, respond as if you're commenting on Reddit:
human
I think machines and computers will replace 90% of human jobs within 30 years. CMV

Some points to  consider

* Non-skilled jobs and non-technical jobs will be a thing of the past. Any job that doesn't require a college degree is **already** obsolete (in 2013), the fact that the positions still exist is simply a consequence of a machine not yet having been designed and installed in all of these industries. It's going to happen soon. Think about a McDonald's, what job in a McDonald's can't be done by a machine?
* Skilled and technical jobs (that require creativity and problem solving skills) aren't impossible to teach to machines. Most employees have protocols to follow in their work, and what is creativity but the ability to mix seemingly unrelated ideas together in new and useful ways? A computer can't be creative? 
* Don't forget to think 4 dimensionally; just because a computer can't do something today doesn't mean a computer won't be able to do it in 20 years. The main difference between the human brain and a machine is that the human brain can dynamically rewire itself based on experiences - machines can virtualize this process or we could build machines that have more dynamic hardware components so that they can do the same thing

Beyond this discussion, we could discuss what happens to society when 90% of our jobs go out the window... but I'm more interested in being convinced that 90% of our jobs won't go away. Show me/teach me/explain to me why machines won't replace humans. Also, I know the 'luddite' mentality is quite old, but computers are game changers in my view. And I would argue that low skilled jobs have been phased out. We are in a world where people without high school diplomas and often college degrees struggle to find work at all. So please keep this in mind as well. 

I'm really hoping to see some good discussion about this, it's an issue that has plagued my mind for over a decade.
gpt
I mean, I'd quibble about your timeline, but the important thing is that this already *happened*. The development of automated factories and better farming techniques has eliminated 90% of the jobs that existed in the mid to late 1800s. This hasn't resulted in massive unemployment; instead, this enabled the creation of new jobs, that couldn't possibly have been supported before.