Opinion of the Court
The same answer follows from the core justifications Panetti offered for framing its Eighth Amendment test as it did. Echoing Ford, Panetti reasoned that execution has no retributive value when a prisoner cannot appreciate the meaning of a community’s judgment. See 551 U. S., at 958–959 (citing 477 U. S., at 407–408); supra, at 3. But as just explained, a person who can no longer remember a crime may yet recognize the retributive message society intends to convey with a death sentence. Similarly, Ford and Panetti stated that it “offends humanity” to execute a person so wracked by mental illness that he cannot comprehend the “meaning and purpose of the punishment.” 477 U. S., at 407; 551 U. S., at 960; see id., at 958. But that offense to morality must be much less when a person’s mental disorder causes nothing more than an episodic memory loss. Moral values do not exempt the simply forgetful from punishment, whatever the neurological reason for their lack of recall.
But such memory loss still may factor into the “rational understanding” analysis that Panetti demands. If that loss combines and interacts with other mental shortfalls to deprive a person of the capacity to comprehend why the State is exacting death as punishment, then the Panetti standard will be satisfied. That may be so when a person has difficulty preserving any memories, so that even newly gained knowledge (about, say, the crime and punishment) will be quickly forgotten. Or it may be so when cognitive deficits prevent the acquisition of such knowledge at all, so that memory gaps go forever uncompensated. As Panetti indicated, neurologists, psychologists, and other experts can contribute to a court’s understanding of issues of that kind. See id., at 962. But the sole inquiry for the court remains whether the prisoner can rationally understand the reasons for his death sentence.
