Originally Posted By: Bryan
In quantum systems (which is what we are talking about), "infinitesimally" can be specifically defined via the uncertainty principal. Basically, at some small period of time (t) you will "see" individual quantum states.

Define what you mean by a "quantum system" and "quantum states".

The terms "quantum system" and "quantum states" were yours originally; in fact my question was an initial attempt to discover precisely what you meant. (Thanks for prompting the memory).
There never was nothing.