You have exactly the same rights, regardless of Miranda being stated.
I agree with that ruling. After all, we have all heard it on TV for decades, so I would bet each of us already has it memorized, even if we’ve never read it, ourselves.
“You have the right to remain silent…”
I think the key, on consideration, is that someone in custody shooting off their mouth, is not being *compelled* to testify against themselves.
That makes sense.
The issue I have is the misuse of this by officers, counting on the accused being too scared, too poor, etc., to move to have the non-Mirandized statements in custody removed from the record; and then there’s the issue that if one goes for a reversal of a conviction, the courts can still find that on balance it is harmless error, that a conviction would have happened anyway.