> Question then becomes, how do you build such non-constrained machines? Also, how do you confirm that such machines—or even small scale prototypes—are not cons

> Question then becomes, how do you build such non-constrained machines? Also, how do you confirm that such machines—or even small scale prototypes—are not constrained by classic laws of physics? You mean, like... transistors? ;-) https://en.wikipedia.org/wiki/History_of_the_transistor https://en.wikipedia.org/wiki/History_of_the_transistor (search for quantum)