It is hard to see an accident coming, but you can always look back to see the consequences. When we talk about opposing tyranny, at what point do we define as the crossing line when the government goes from “of the people” to “against the people”.
We’re here at a certain point in time.
The past is over and therefore determined.
According to the theory of classical dynamics, the future is also determined, from the “initial conditions” (the present).
Unfortunately, even if it were, we don’t know the intial conditions precisely enough, and even if we did, we couldn’t solve the equations!
And anyway, the future is more like a quantum probability than a deterministic outcome.
That said, in answer to your question of when we cross the line to gov’t becoming tyranny, for the U.S. it’s been more like the frog in the pot with the temperature slowly rising.
It’s pretty hot now.