Whether a defendant can knowingly, voluntarily, and/or intelligently execute an appeal waiver of conduct yet to occur in the proceedings, vis-à-vis sentencing

QUESTIONS PRESENTED 1. Whether a defendant can "knowingly," "voluntarily," and/or "intelligently," . ) execute an appeal waiver of conduct yet to occur in the proceedings, visa-vis sentencing. 2. Whether a "miscarriage of justice" exception exists to a valid appeal waiver for errors committed after execution of that waiver. : ; , -1| |