My approach is that everything is equally real, just not everything is equally useful. In a meta level, talking about what's more real is not useful outside a specific setting. Unicorns are real in MLP, cars are real in the world we perceive, electrons are real in Quantum Electrodynamics, virtual particles are real in Feynman diagrams, agents are real in decision theories, etc.
If it's worth saying, but not worth its own post (even in Discussion), 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 be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.