[Right Wing Professor]

In fact, modern physics requires that something (virtual particles) is created out of nothing, every instant of time. And the measured values of several physical constants depend on that creation of something from nothing.

[AndrewC]

In fact, modern physics requires that something (virtual particles) is created out of nothing, every instant of time.

Am I to conclude that time and space are nothing?

[BMCDA]

In fact, modern physics requires that something (virtual particles) is created out of nothing, every instant of time. And the measured values of several physical constants depend on that creation of something from nothing.

Isn't that demonstrated by the Casimir effect, if I'm not mistaken?

As an aside, IMO "from nothing" resp. "out of nothing" is a reification fallacy (Odyssean fallacy ;-). We treat "nothing/nobody" as an actual entity and not as a placeholder (like zero) and this causes a lot of confusion. Unfortunately it seems to be just a nasty artifact of our language (not sure if this is also the case in non-indo-european languages).