But, in order to be vigilant, one must know and ACTIVELY use the right or be subject to losing it.
And now we know.
Miranda Rights aren’t just pretty words to say.
https://www.youtube.com/watch?v=9tRgYfQ48A0
Miranda was totally made up out of whole cloth. There is no obligation to warn a criminal defendant not to confess in the US Constitution. That was a policy decision from the SC in the mid-60s.
The Constitution says that a defendant can’t be forced to testify against himself. And, prior to Miranda, there was a long body of cases on confessions and whether they were voluntary or not. Police can’t force a confession out of a suspect, and they were not known for being scrupulous about ensuring that defendants were not coerced into a confession. But the Constitution didn’t require Miranda and its specific requirements.