You have confused “inalienable” with “unalienable.”
The Constitution speaks of “unalienable” rights.
Unalienable rights are inherent in every man, granted by the Creator.
They cannot be surrendered except under lawful punishment.
Flynn was coerced, by threat of a prison sentence, to surrender his right to appeal and to introduce new evidence.
No American can surrender his right to due process and a fair trial.
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I have not confused anything. People can and do validly waive Constitutional rights every day.
Happens all the time. Plea bargain, no trial.
Due process is what the court says it is, not what any one of us thinks it is.
And generally speaking, "alienation" it giving to another. You can suicide, but not Frankenstein.