In many previous comments, people call on professionals to answer questions about specific fields, like physicists, neuroscientists, economists, or computer scientists. There are many people in all these professions on this site willing to respond to questions, but most of the time none of them happen to read that comment.
As a way to fix this, I propose that people well-educated in certain fields volunteer to make an "Ask an X" post where they list their credentials and specialties, and anyone can ask questions about that field. Obviously, this would also be a good place to have a discussion between professionals in that field.
Another possibility is to ask people who don't mind being asked random questions to volunteer to be part of a list that can be posted to the wiki. Then, people could just PM that person directly.
You go first! And before you say 'I'm not a professional', it doesn't matter if you don't know anything about anything - you probably know something about something, or you can ask an individual you know to volunteer, or you could pay someone to do it, or you can try some other clever solution that takes more than 5 seconds to think of.
For every person saying 'how about someone does Y', we need 10 people doing Y and seeing what happens. It's a great idea. Lots of things are great ideas. Enough with the ideas! Act!
Okay, I'll commit to emailing 7 people in a field, asking them to come to this site to answer questions.
First, I need to know what field people are interested in hearing from. I'll make a separate comment asking people what they'd most like to hear from.
Assuming I get decent levels of responses, I commit to emailing people doing this by the end of 2 weeks from now.