What evidence is there that developing even a rudimentary general/strong AI is remotely likely in the near future (within the next 10, 20, 50, 100 years)?
1) What is the state of general AI research? Are there any promising (i.e. having some measure of real progress) approaches currently?
2) Are the major problems/roadblocks to creating a strong AI even known in any sort of nontrivial sense?
(To be clear, please leave discussion about "if we have a strong A.I., it will/could be a threat because...." for a different thread. The question is about why the prospect of a general A.I. is being seriously considered in the first place)
From doing a bit of research, it seems like most contemporary AI methods are statistical/optimization techniques in Machine Learning, etc. These can be extremely powerful tools, but as far as I can tell, they are applied to very specific problem instances. Is there any hope of more powerful/general techniques emerging from this area?
It seems like a real solution is not simply a matter of time (within the next 100 years or so), but instead will probably take several major breakthroughs and insights coming from unknown places to achieve.
and its completely harmless to warn people about something 100 years off.