[sedan_baklazhan]

I wouldn't be surprised if in (n hundreds/thousands years) we find out that copying consciousness if fundamentally impossible (just like it's fundamentally impossible to copy an elementary particle).

[alfiedotwtf]

Elementary particles are suspiciously indistinguishable, so even if you could copy an electron, you wouldn't even be able to tell!

See https://en.wikipedia.org/wiki/One-electron_universe

[bananaflag]

They meant this, which refers to copying the state of a particle into another (already existing) particle

https://en.wikipedia.org/wiki/No-cloning_theorem

And basically, about consciousness, what they said is true if our brain state fundamentally depends on quantum effects (which I personally don't believe, as I don't think evolution is sophisticated enough to make a quantum computer)