Though it does eventually roll a 6 almost always.

Which is math speak for 100% of the time.

“ever” implies the limit of time. Since lim_{t->Inf} p(at least one 6 is rolled) = 1, I think you could say it’s guaranteed.

Yet, it probably will.

if it has once, it will again

https://en.wikipedia.org/wiki/Poincar%C3%A9_recurrence_theor...