Finally, 34 years after the original decision, the Court was loath to overrule "Miranda". Typically, the Court overrules constitutional decisions only when their doctrinal underpinnings have eroded. The Court felt that this was not the case in "Miranda". "If anything, our subsequent cases have reduced the impact of the "Miranda" rule on legitimate law enforcement while reaffirming the decision's core ruling that unwarned statements may not be used as evidence in the prosecution's case in chief." The "Miranda" rule did not displace the voluntariness inquiry.