Does the 8 amendment & the court jurisprudence prohibits a state from excusing prison whose mental disability leaves him with no memory of the commission of the capital offense?

Does the 8th Amendment prohibition of cruel and unusual punishment preclude a from executing a prisoner who suffers =s from severe cognitive dysfunction such that he cannot remember the crime for which he was convicted or understand the circumstance of his scheduled execution? Justice : 1. Write Opinion _Which side should Win WHY? -Cite Case Law -SameHow? Different How? 2. Prepared questions both side 3.Prediction of Robert Court Opinion Justice by Justice W/ Rotational?