dadbrain

VR is the extreme case of AR when nothing from the real world gets mixed in.

I love the feeling when I read a statement and its truth is immediately obvious, yet I had never before considered it. VR is a boundary condition of AR.

What preventative safety measures do you take to prevent inhalation of toxic metal oxides in cremains?

That's an understatement! If the EM waves move at 1/3 - 2/3 c, that means 100 000 - 200 000 kilometers per second.

The electrons, on the other hand, move on the order of millimeters to centimeters per hour, typically.

it's like an ocean of water; the energy differential in a wavefront propagates through a medium (e.g., the water molecules) faster than the propagation of the medium itself (ocean currents).

A wave of electrons (absorbed and re-emitted electrons in overlapping valence-conduction energy bands between atoms) propagates much faster than the electrons themselves, but not as fast as photons travelling unhindered in a vacuum.

Within the context of your field of expertise, what thing(s) do you believe/speculate are probably true, but for which there is currently no conclusive evidence?

I find that running and staying near my oxygen limit helps clear my mind of "noise".