I have no physical proof, just my own personal concept of reality.
As Eagleman points out, for each of us, our own experience of reality is something unique to the individual; it is something fabricated by our brain and each brain is slightly different.
Consider this : I thought about buying a virtual reality headset for my kids at Christmas. Didn't in the end. But in truth, we, each of us, already have such a thing, it is called a brain. That is what our brain is, in effect, an organic virtual reality headset that we can never ever take off; we are stuck with it for life; the 'reality' created for us by our brains is the only one we can ever experience but it is not 'real' reality, it has no remit to show us the truth of what is out there; rather, our reality stream is a useful fiction which continually blends new experience into models accumulated from past experience. This is why we need science - to discover what is objectively valid, we need to eliminate personal experience as a guide and compare collective accounts of experience for common denominators
