I feel like I'm missing something with the purpose of the recall accuracy study.

> Third, the study enabled an unprecedented objective test of survivors’ recall accuracy. Many have wondered: Have those who recall death experiences—even of happenings during the resuscitation—experienced hallucinations, such as commonly reported with oxygen deprivation or psychedelic drugs? Or are their out-of-body reports of cardiac arrest events factual and verifiable?

How does the ability to recall and report an apple, pear or banana confirm/deny whether the persons have experienced a hallucinogenic event or not?