What's missing from this list?
Here we have New Scientist talking about straight-up metaphysics. What is reality?
Is it numbers?
Is it all in our head/solipsism?
Is it consciousness?
Is it nothing?
Is it a computer we're being simulated on?
Is it matter?
Is it laws?
A lot of pretty wacky ideas, even by metaphysical standards, are given air time. One popular, age-old, well-defended answer is missing.