[Physicist]

That makes it continuous, zero being the briefest. That means the particles are always there.

"Always" isn't the briefest time, but the longest time. "Never" is the briefest.

[AndrewC]

Post 104, but what I was trying to determine was the limiting factor on the "existence" of all particles in all of space.

[Semper]

"Always" isn't the briefest time, but the longest time. "Never" is the briefest.

Clarification please. "Always" and "never" don't seem to include the limiting concept of time, while "longest" and "briefest" clearly do include the element of time. In other words, how can "never" be equated to "brief" since the former is without time and the later implies some degree of time?